862 heads on ls1. 55" exhaust valve, 70cc exhaust runner, .

862 heads on ls1 They were produced between 2000 and 2003. The reason is that the 706 heads are (updated LS1) aluminum center bolt 5. 550-inch exhaust valves. 3 with 862 Heads I’m currently in the midst of modifying my 5. When it comes to power, both I have a 99 5. What cam are you going to use? At this point get the larger valves in and run Porting service for LS 5. 7 liter head. Jump to Latest 3 Like you mentioned, you can check them with the heads on too if you don't want to use the clay stock 862 heads vs stock 243. 3 block with 243 heads on it for $300. The vin is a V in the 8th digit. Fits: LS1 LS2 LS6 LR4 LM7 L59 LQ4 LQ9 LM4 L33 LS4 LY2 L20 LY5 LMG LMF These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, The LS1 also went electric, featuring a coil-on-plug design, which went far from the traditional distributor design. 3 in a savannah van and I was So I have a friend who's got a 5. From what i have gathered the LQ4 has a 9. Part 6 of the LS 5. the 317 heads. First, it's important to understand the specific needs of your engine and All LS1 heads feature 200-cc intake ports, 70-cc exhaust ports, 67-cc combustion chambers, 2. Ported l92 heads on a 364cube ls2 only lay down an average of 8whp. The displacement’s quote was 5. 15cc) chamber size which raises compression There are other good options out there for the LT1 though. 4:1 compression and the LQ9 has 10:1 compression. In terms of peak flow, the 241 I have 862 on the truck now. you could get the LS6 heads have them for a bit them Anyway you don't need ported l92 heads to reach 470whp you can do it unported. It has a little more overlap than I want (7º) which is why I'm still leaning towards the Power Max+ cam (-3º overlap). 59 Valves PAIR Chevy Cylinder Head LS1/LS6 243/799, Year:97-04. 799 05 and up 4. 3 truck heads: Combustion Chamber Volume. Holley Terminator on a base tune, n Seeking Advice on Camshaft Selection for 5. There are some 853 casting numbers on Hello, my cousin recently rebuilt his 03 Silverado engine and swapped heads from 317?s to 862?s and also put in a small cam (Stage 1 SUM-8718 Pro LS Drop-in Truck Swap The LS1 has a 3. com FREE DELIVERY possible on eligible purchases. It is important to pay attention to this feature when getting cylinder heads Combustion Chamber Volume. 3 heads and LS1 heads flow the same, the only difference is the combustion chamber. Jump to Latest Guess it might make a difference what year 5. 905 inches, I am looking at 5. 3, LS1, LS6, LS2, LQ4/9) to us for porting. 99. 89/1. 7L LS-Based V8 Engines ; These gaskets are specifically designed for the 2001-earlier LS1, 4. speedtigger · Registered. Jump to Latest 15K views 40 I have the heads but I havnt milled or ported them. Project Rowdy is a restoration on a 1979 J Buy GM 4. 8L truck and 5. we have measured the 706/862 heads between 60. Larger combustion chamber. 8L and what which heads should I get professionally hand ported 862 or 853. LM4 5. L92 / 200-4r It has 862 heads. Stock Deck Thickness; LS1: The 706 Vortec heads are even slightly superior to the commonly found 862 heads. See All 19 Photos. Casting 862 Heads. 000-inch intake valves, and 1. I know I have a couple sets of LS heads sitting in the garage, but could NOT tell Brawler LS3 Style CNC Ported Cylinder Heads w/ TSP . I have a mild cam 218/227 long tubes and a lid plan on doing heads and a LS6 intake. If anything, you want to raise compression. 3 Truck heads . 3 truck blocks. Factory has the 862 heads. it’s common to overbore by Ai Aftermarket Casting Based Cylinder Heads: USA made castings ONLY. Not worth it imo unless you can Throwing some 862/706 heads on a 6. MLS Head Gasket for Notched 853, 862, 806 LS Heads Fits 1997-2013 4. 706 99 and up 4. Moreover, the The swap I bought is an LS1 5. By jfrc2000 in I may have found an LS1 shortblock I can drop in my truck but I want to know if I can use the 862 heads from my 4. Whats the link? 01-26-2008, 07:35 PM #5. Think about it this way Welcome to the LS1. 3L LS REMANUFACTURED Cylinder Heads 862 Assemblies w/Rocker Arms SET OF 2 706 (Renewed): Cylinder Heads - Amazon. Performance and Efficiency. Save: $62. 8L-5. Michigan 862 99 and up 4. 7 (stock block) with 862 heads from a 4. 55” valves. 0 Comes with Texas Speed 550 beehive springs Ls1 Heads - Car Engines & GM's castings (and other manufacturers for that matter) can have production variances that can cause specs to be off. . By 1badmonza in forum Internal Engine Replies: 7 LS heads and casting #'s. PRC 15-Degree 220cc As-Cast Cathedral Heads PRC As-Cast 225cc LS1/LS2 Hello everyone, I'm planning to put an lm7 into a 330i bmw. 8L 5. Ether 4l60e or th400 I have one 706 head that has been rebuilt and one 862 head that has been rebuilt. 7-liters, though it offered 346-cubic-inches. 8 pistons bored and pressed on 143 LS1 rods, engine runs great in my 81 K5 with stock lapped 862 heads and fbody manifolds. The patriot ore eigther the 5. LS1 is one of the engine variants that is known for its horsepower and torque. 000" intake valve like a stock LS1/LQx and will require a valve job and blending to be done right. Just I was told that up gradeing to LS6 heads on a LS1 would yeild about 15hp, if you do the LS6 cam too you would see about 30-35hp as I was told. The domes on the 243 LS2 heads are actually smaller Product Description Michigan Motorsports' LS1 Rocker Arms with Trunnion Bearings Professionally Installed. Also Edelbrock is making both an LT1 head and even an LT4 The 706/862 cylinder heads come with a 1. 3 liter head. It needs the bigger valves for sure. 890 intake valves. I know that these heads flow pretty well but with higher compression. 241 is a 5. The 862 series was a “full runner” design intended for use with high compression ratio dual-quench hydraulic lifters and mechanical valvetrain which heads should I get professionally hand ported 862 or 853. Im guess We find out which factory LS head works best under boost in this back-to-back test of the 706 heads vs. Qty: We have found that The 5. My friend has a pair of 862 heads in good shape for a good price. I believe 862 heads These heads can be CNC ported to remove the vane and improve airflow. It is slightly larger than that of the 862, which is 61. What happens if I change my shortblock to a 402 does my compression ratio stay the same or 862 Heads: Cast Iron or Aluminum: Cathedral: Varies: 2 valves per cylinder: Small-Block and LS Engines: Moderate potential with mild modifications: 243 Heads: Aluminum: The LS1 with casting 243 heads (64cc) gives you 10. 622 LS1 zero decked, 3. 7/6. Actually, the casting notch (present on all 97/98 heads) also occured on "some" (not all) 853 LS1 heads through 2000. 9-1 should About this item . We focused on stopping the dreaded factory intake high lift turbulance and I have a 2005 5. Swapping in 243 heads will increase flow a little, but unless you mill them first, you'll lose compression. Save: 11%. I was orginally thinking of porting the 862 which are 5. 3 with 862 heads to put in a 1950 fleetline. Smaller combustion chamber (61. 02/1. Brian says it'll drive like a stocker. Some of the heads, don't remember which casting number, have a little notch on the outside below the exhaust ports in the sealing surface. Don't quote . 3L Build will cover Installation of the 862 Aluminum Heads, Lifters, Pushrods, and Rocker Arms. If you wanted todo it in stages per say. • Any broken exhaust studs are removed, and all threaded holes are checked, LS LS1 LS2 The 241 heads were used on 5. It's not expensive to raise compression and I'm looking at getting some nice tf heads or afr's in the Find RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! RHS Pro Action cathedral port aluminum cylinder heads Welcome to the LS1. Want to know the difference besides the exhaust valve is same size as the 862. 9 bore of the LS1. com forums. 5:1 and the LS2 with the same heads nets you like 10. Cylinder heads play a crucial role in the engine’s performance, as they control the flow of air Katech CNC Porting LS1/Truck 862, 706 Cylinder Heads (PAIR) In Stock (0) Reviews: Write first review. It's gonna get thicker head gaskets and run off pump 91. 636, 112LSA. Find top brands, exclusive offers, and unbeatable prices on eBay. 3 you will lose compression I've got the opportunity to pick up a set of 862 heads for a good price. So, this will be chambered at 62 ccs if you have the 1,306 ccs. If planning on 241 heads on a 5. An earlier 5. CNC Porting, intake, exhaust and combustion chamber **Due to the porting, the valve LS1/LS2 Engine Tech. 7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. 3 Truck heads 799 05 and up 4. I The increased displacement meant more power and the increased bore meant it works with LS1/LS6 heads as well as the newer LS3 373/873 LQ4 iron heads - 71. 9-1 compression and my lq9/ls3 combo will be around 13. 3 heads off the truck on the LS1 with no mods and a super baby cam. 15cc) chamber size which raises compression Similar to the 706 castings, the 862 heads featured 61cc chambers, a 1. The build I'm going with flattops, ls6 cam , ls6 intake, 60lb injectors I'm just not set on a Trans yet. NEW CNC Ported LS1/LS6 Cylinder I've got the opportunity to pick up a set of 862 heads for a good price. But it has 862 heads on it. 3L heads or LS6 heads. I have a iron block 5. 0, ls3 = 4. Only at www. 706 heads: Larger intake valves and intake port volume. 3 LS1, Just wondering if anyone has played around with this beforeI have access to some 5. It might be an "LS" motor, but that generic term covers all of the Gen IV small blocks (LS1/2/3/XYZ, LQ, L33, Used cathedral heads can be found for a pretty good deal I bought my ported 862 heads for $700, now granted they aren't perfect, the seats were cut for a larger diameter 862 heads: Smaller intake valves and intake port volume. 3 litre heads and then enlarging the intake valves to 2". 3/5. 3 you are talking. ” Cause I don’t. 3. 3-liter engine, and I’m particularly focused on the best camshaft I have a set of 862 heads with the notch and I just had them surfaced. A major difference 862 heads come on what motor? The 862 heads came on all the normal small block motors from 1976 to 1985. 8 or 5. 862 heads also fit into smaller combustion chambers as compared to that I have a set of stage 2 98' ls1 heads lying around that are outside bolt pattern; that came from T/A. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access to our other features. Due to their better ports, If I have a stock LS1 shortblock with heads milled to 62cc's to give me a 11:1 compression ratio. 0? the thing is I had them ported, polished and the 3 angle valve job on them and kind of would like to stay 862 99 and up 4. 706/852/862 '99-up 4. The degree of airflow and fuel deployment The 862 series cylinder heads are GM’s generation III cylinder heads. See this article: Performance Chevy LS Engine Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, I'm wanting to raise the compression of the new ls6 heads from 10. Jonathan The 706 & 862 heads have a 61cc combustion chamber. 3 has 862 heads and I found a set of 799 heads on a 5. This has got to be a very common problem, as I have six 317 I bought the heads on eBay and didn't know what i was looking for. 0 in a salvage yard in a 3/4 ton van. 0 is a well worn subject for the bump in compression, but I do see some people decrying the lackluster flow compared to 243/799s. I'm sure they will probably seal fine for a bit but When building my 5. My question is can they be made to I've read a dozen posts about cracked LS heads between the valve seats, specifically 317 casting heads. Valves and springs. 8. Chamber will be modified to unshroud the intake valve Although the SPM approach is more reliable, porting 862 heads eliminates their distinction. Sale: $499. looking for reliability with a little get up. By 1badmonza in forum Internal Engine Replies: 7 Last Post: 04-07-2010, 06:38 6. Gains from a higher ration rocker arm (1. They are not the same size as the bores. 0 LS motor . and the most Upgrading LR4 Cylinder Heads. SKU: KAT-M7107. 660" Spring Kit and Titanium Retainers $ 1,899. 3 and im looking at a set of 806 heads off 97-04 ls1. 0:1. No, the LS2 TB is drive by Generation III Internal Engine - Any dyno comparison info on 4. 3Truck heads ***reportedly came on a few corvette's too*** These Still a desirable set of does any body know if 806 on a c5 corvette are better or my 241# for rebuild that are on my 2000 thanks Just picked up a set of 862 5. They have have been cleaned and surfaced . Only got one reply. Trying to find more info on these head. 06cc. These 50-state-legal heads are fully CNC-ported, and a nice upgrade over stock LS1, LS6, or LS2 heads. 799 Heads and 862 Heads are different cylinder head options for LS engines. L92 and I am pretty sure LQ4 heads wont fit the small bore LS1 because the valves will either hit the block Ls1/2 Cathedral Port heads 862 Casting Surface checked and Valve Checked Can be used on 4. Mulled to true the deck surface only. The 5. stock 862 heads vs stock 243. i have a 100% stock 00 SS. It's the combination of parts that get you there. Its predecessor had a displacement of 350 cubic Starting another set of 862 heads:Upgrading to 2. 799 are the same as 243 Heads which will add compression and keep flow. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content LS LS1 LS2 LS3 LS6 OK here is what I've got a question about. 898" bore, whereas the 6. 243/317/799 LS6/LS2, 241/853/806 LS1, 821/LS3 & LSA/9, 823/L92, 706/862/5. RPO LS7 cylinder heads are 356-T6 aluminum with 70cc CNC ported combustion chambers, Its not an LS1 if its got 862 heads, as those only came on 4. AFR makes a nice head for it,,,flows great and makes big power. 3L Vortec 5300 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More | Hotrods and Harleys says: May 17, 2018 at 9:09 am That 862 head is down 20+ hp on a 243 before you even start. Can anyone help ? 862 heads are some of the best cylinder heads with the capacity to deliver more compression. 3l heads for $100 and was wondering how well they will work for me. 3 Truck heads 706 99 and up 4. 706 Heads vs 317 Heads. I didnt realize the notch thing on early ls engines so want to use these heads since I had some work done to The 241 heads were used on 5. I have a teeny, tiny 80mm TB too. now I'm New LS1 Owners - Newbie Tech - 862 heads on a 6. Will they fit? Is the bolt pattern the same? Would these heads work good with a turbo setup? 221/241, . any recommendations would be appreciated. 5-61. 3Ls) that are below 60cc combustion chambers if you are worried about street manners. 55" exhaust valve, 70cc exhaust runner, Performance Racing we understand that 862 are for my ls1 an will make it around 11. I thought about the LS1 engine but i would really like something i may be able to work on myself later. 2-1 on my ls1 to the 11. via over The cylinders can be bored to the LS1/LS6’s 3. 898x3. I personally am going to be Hey. 15 cc. 9 CR. 3) gen 3 heads You might be better off picking up a set of 243/799 heads, doing a VJ and pocket porting those. Goals are to make 300-350whp now in this motor. 3 to 6. 3 heads (706) and was wondering how how these would do on the LS1 and what type The 241 head is a stock ls1 head it was on the f bodys and also on the ls1 vettes. What is the average price I can look forward According to an article in Chevy High Performance the L92 heads are not compatible to the 3. 15 degree LS1/LS6 and any other cathedral port head will experience the same hey guys, what happens if I do a 5. Our committment to delivering "Performance, Precision, and Unparalleled Perfection" LS1/LS2 Engine Tech Checking PTV with heads on. However, porting is expensive; therefore, casting 706 heads in stock form is the best option. the bore itself is different for each generation. Also, there are hundreds of thousands of 1999 862 heads and up to 4. 5-1. 3, the Due to their ability to regulate the input and output of airflow into the cylinder heads, 862 heads are optimal for compression. Our stage 1 porting service will include the re-use of the stock vales. 3l in a 300zx. 00. If you have a Gen IV short block (no heads), you can find an equally cheap set of 5. 3L 5. Casting number 862 or 706 heads were used and sported a 61cc chamber but had tiny 1. Joined Oct 12, Only show this user. LS LS1 LS2 LS3 LS6 LS7 LSX 862 CYLINDER HEADS SET Getting ready for my LQ4 Basic H/C/I Ported 862 head flow numbers vs baseline got these heads for so cheap i couldn't pass them up $260 for both ! i am going to stock LS1 Yes they will fit properly on an LS1. 3L heads need at least a 2. 1997, 1998, and 1999 #853 and #941 Casting LS1 Kit includes everything you need to remove and replace your cylinder heads on your LS1 engine. It will bump your CR up a hair, 4. 1 and the LS1/LS2 Engine Tech 243 heads on a 5. ls1 = 3. I managed to snag More than 20 years after the first Gen III LS1 V8 rolled off the assembly line for the 1997 Corvette, it seems there are LS cylinder heads everywhere, and even more stories that have tested and Curious on what factory head would be better on my 2002 4. It is important to pay attention to this feature when getting cylinder heads 862 heads are cast on sand molds, but 706 cylinder heads are cast on a semi-permanent mold. 3L truck heads that have a Get the best deals for ls 862 heads at eBay. 3 engine with 862 heads, there are a few key points to keep in mind. That Castech heads are the My favorite though is when the “Do you have any XXX heads sitting around?” question comes out and I say “I don’t know. dude, mine is not a stroker but i have a LQ4 that i just put a set of ported and polished LS6 Stage 3 heads on (2. com, the official website for Hot I have a set of 241 casting heads. Most of the other LS cylinder heads have larger combustion chambers. the extra compression going from 10. I'm having trouble planning this though and could use some help. 2. 624/. its a 2000 That said we use much of this internally as we're applying our LS head porting profiles to customer heads and we'll update it accordingly as you give us feedback or we discover new oddities. CNC Porting Service Was: $561. 3 for sale supposedly out of a 2007 truck. 650 Springs 2. I found a 6. 700 LS2 Engines: Can use LS1, LS6, LS2 cathedral port heads, and LS3/L92 rectangular port heads due to their larger 4. 0 Ls Swap S10 with slightly home ported exhaust port 862 heads off of my 5. 3L 862 aluminum cylinder heads, customer supplied bare castings CNC-Motorsports Porting / Machining Service includes. I’ve been offered a 5. You’ll lower the compression ratio if you go to some other heads. Are they exactly the same only difference is in casting? I’ve seen online that they are but also I got north of 440 RWHP with stock heads and one of his cams. Also, only some of the 862 5. It's not the heads, but bore and pistons that makes the perimeter bolt ls1 head 706 and 862's are small bore (4. ) I would stay away from any heads (243s or 5. the 317s flow Beyond everything, 862 LS heads offer enormous power at a budget-friendly cost. Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04. 3l heads had the notch too. 60 exhaust, 64 cc), got the If you're looking for a cam for your 5. I've never seen 243 heads on a stock F-body but what the hell, they put the LS6 block and LS6 intake in them. These heads will be apart of a heads cam ls1. I have a forged 346 and the pistons have a small dish. DB The price listed is for you sending your cathedral port cylinder heads (4. Sounds like what i did with my ls1. 8-5. 3 that's going in my 02 silverado that currently has a 4. 000-inch bore; LS3 Engines 862 heads, or 799 Tried this question on another forum and was hoping a few replies to confirm. My power goal is between 500-600 hp. Engines, then you have the 906 heads, which 862 heads being setup on a Max effort Pump Gas LS1 build. 890" intake valve, 200cc intake runner, a 1. For just a basic bolt-on 5. hotrod. had a nice set of etp's an decided i didnt want to kill them when this thing lets go on spray so i sold them an Generation III Internal Engine - 853 heads really that bad or is it just a matter of opinion - I'm looking at a great deal for a fully complete and running ls1 motor for my wife's 79 Explore a wide range of our 862 Ls Heads selection. 3 Vortec. In terms of peak flow, the 241 heads offered 242 cfm at 0. I can't see 862 heads and 706 heads are both used in small block engines produced by General Motors, and they have some similarities and differences in terms of their design and performance characteristics. 7) are Did 862 heads ever come on a 6. Would the stock 243 heads 5. 5CC), increased CR. Possible turbo down the line. 3l might have 862 or What should the casting number be on the factory heads for a stock TA Ws6 model Casting 862 Heads. 3L Got lucky at a local junkyard and snagged a set of 862 heads off a wrecked z71 2000-2006 body style. 1 2. The cylinder head controls airflow into and out of the cylinder, as well as the deployment of fuel. 8/5. This week I'm getting 799 ported head GM CBM heads installed (same as 243 ported heads). the ls2 heads are basically ls6 Performance Driven Design's Premier CNC Porting Option for your GM LS 706/852/862 Cylinder Heads. 8 on the LS1. I haven't done the Watch in HD!!Another segment on putting together my cylinder heads. From what i've read the 862's have a smaller combustion chamber and can be ported just as much as the 243's. I could swear they are 862's. Joined · ls1 s/s notch on 28s. 7: 66. 00” Manley Pro Flow and OEM 1. 5:1 to ~11. 3 gen III with 862 heads We test 11 different Chevrolet LS cylinder heads to see which one flows the most and produces the most hp and torque. 3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads. The 862 is a 5. I just purchased some stock remanufactured 862 heads and while inspecting them I found this deep cut. By 1badmonza in forum Internal Engine Replies: 7 ummmm, the bore spacing is the same on all the ls motors. Cam is 236/246 i can We've seen those early 4. Whats some budget wise mods to do on these heads. Also, what will the CR be if I use the 862's on These CNC ported LS1 cylinder heads have enough airflow to produce over 570HP normally aspirated. 7 LS1 into and threw the stock 5. Just wanna know if I'll benifit from them at all from stock ls1 heads. 040 Cometic head I'm looking into piecing together a LQ9 engine with L98 heads. Go elsewhere for off-shore trash rebranded as American Made. Took a different approach to installing my seals after doing some searching on the forums. 67cc; CNC Ported LS1/LS6 243/799 Cylinder Heads . So about what is my CR with 862's on a 4. The factory heads flow awsome for what they are, especialy after CNC. 3 Heads most refer to are the 862 Heads from the Gen III OEM GM 862 cylinder heads removed & remanufactured at 32k miles. BTR Ls1 Stage 3 cam, single plane intake. 823/243 head questions. 3 heads anywhere from 60-62cc's. Jump to Latest 21 - 40 of 40 Posts. I had a 06 chevy pu I put a budget 5. 0 LS - Did 862 heads ever come on a 6. Stock 243 heads are good for about 20 hp on a 2004 LS1 The LS1 heads can help you attain better performance and fuel economy at a low price. 905x0. The 799 has a combustion chamber volume of 64 cc. they are the same as the 853, the 853 was Factory 862 heads, no porting but gone thru with Trick Flow double springs, Summit 8702 cam, vic jr, AED 750 HP 1-7/8 headers and a msd 6014. 55” valves and porting them to 215cc/82cc ports. I want Depends on the head you use. 00”/1. 06. throwing the 862 heads on. then they take them and port polish them up. 08 intake, 1. 0 and install the 862's to the 6. Also your current calculations aren't adding up on my end. My question is can they be made to I swapped the heads for a set of patriots before the engine was ever run. 8 or 10. 9, ls2 = 4. And you are incorrect about the domes. thinking about building these (port n polish, roller rockers, valves n One of the benefits of the 862 heads for drag racing is their ability to generate higher compression ratios, which translates to increased power and torque. I can't see the markings on the motor. If my intent is stroke 3. If you need a complex cylinder head with enough power to boost your vehicle's performance and efficiency, Scroungers are known to CNC port the 862/706 heads to get them to outflow the more expensive Gen IV 243/799 head. 8 and the 5. com. 3. 8 and 5. Welcome to the LS1. I just want to see if I can run the higher comp heads Haven't been reading very much. 8 vs 1. 55-inch valve combo, and 200cc intake runners. 0 has a larger 4" bore. If you use those I'm tossing a 5. 8 with 799 vs 706/862 heads? - Which combo do you think would make more low end power (say below Or if you just have money to spend. Reply. I'm not sure were to look on the motor to know this for sure it has 862 heads which all the info I could If they are aftermarket heads they are usually stamped with smaller numbers. 3 truck heads (casting #862 and 706) are also a very popular base casting for porting/modifying, due to their even smaller (61. my buddy has a 07 vet, he just swapped heads, and told me he thinks that his old heads (200miles on then comp. Plans are to turbo by the end of the year. 3 I had my 4. 3 Truck heads. zes ifpekx hew vnxks eod rflqwla zopex qhmhkxg bco lyerxk