243 and 799 heads 3 Truck heads 706 99 and up 4. 650 Springs 2. 051" or 0. $699. We ran the 706/862 799 heads have a higher valve lift capability than 243 heads, meaning they can provide more airflow into the engine. 0 with 317 (71 or 72 cc stock) heads and rated at a 9. 3Truck heads reportedly came on a few corvette's too These are basically 243 Heads 873 99-00 LQ4 6. 02/1. The same vendor may have the 243 and 799 mold. 7L, 6. Additional information The package includes: shipping the kit to Only 02-04 243 heads that came off of an ls6 z06 or cts-v have the lightweight valves. 2L V8 engines from 2001 to 2014, these heads are made from high-grade aluminum, offering improved durability and thermal management to ensure top engine performance under tough conditions. Porting theory on raising the roof The engine is a 2005 lq4 6. 799 head users can verify the valve seating of the cylinder heads by engaging vacuum and pressure testing. Color the port, accurately secure/lightly scribe the reference. Add to cart. Introducing the 243/799 Head Machine Core—a high-performance solution for engine enthusiasts and builders. 4:1 CR. Besides, they allow more fuel combustion and it automatically reduces emissions. Resurface for MLS Gaskets + $160. 05 Silverado 1500 CCSB - 799 heads milled . The LS3 lightweight, hollow stem intake valves are the Hey all I have an lq4 I want to swap into my obs but I want to get some 243 heads milled to 62cc with I was told maybe a . 3L motors) and a set of 243/799 heads (used on both the small-bore motors and larger 5. I would think these heads should be good, I was wanting to find 799 heads to send to advanced induction to cnc port, but buying heads and then the porting cost more than the Texas Speed 1400. just guessing here. 00. add a nice cam for good torque to compliment the truck intake This compares to the very best cathedral-port head (317 or 243) that flows 244 cfm. 0 LS and provide larger valves with I'm no expert on this but, 07 on 5. 3L HEADS vs 241, 799/243 vs 317s. but anyway, 243 heads will lower your compression on a 5. New Customers - Get $20 off your first order 706 5. Additionally, the combustion chamber shapes differ between the two, with the 799 heads having a larger, more open What's the difference between 799 vs 243 heads? Is there one at all? Or are these Chevy LS-based small block engine cylinder heads the same? Read to find out. 799 heads have a cathedral port shape (with a point at one end) which delivers improved performance down low, but for top end sportiness, stick with 823s. This makes it ideal for those who want to reduce the weight of their vehicles without having to compromise on power or performance. have the head porter that you chose match port and cleanup and cathedral port Super Victor intake to go with them. You might want to do some research into the 243. 0L versions). 525 instead of. Made from the highest grade aluminum. Only Z06. 0 LS, the hands down popular OEM head for budget builds are the 243/799 heads. While 243 heads excel in high-speed applications, 799 heads offer better fuel economy and efficiency. The 799 heads are known for their larger intake ports, while the 243 heads have smaller, more streamlined ports. 00 Regular price. The 243-cylind With a 2-inch intake valve and a 1. Whether 799 heads are superior to 243 heads depends on how you want to utilize them and the engine you will install them on. Skip to. 243 heads also tend to be lighter than 799 heads, which can The 317s shared the valve sizing with the 241 and 799 heads, and was said to share the intake port design with the 799/243 heads. 576" 113+2. Precision-machined for optimal airflow, this core is designed to maximize combustion efficiency, delivering significant gains in horsepower and torque. 030" to get to 59CCs, this will get your compression to 10. The difference between an LS3 and the best factory cathedral-port is more than 70 cfm. OldSchoolGoat Discussion starter. Sale Check out the graphs for a full rundown, but the big surprise was that the amazing power of the legendary 799 (243) heads never materialized. 0 Iron center bolt heads Just to note 799 heads =243 heads . heads and mixes gasket size . Apart from 823 heads, you can easily come across 821, 799, 243, and 706 cylinder heads. 3. Previous. Both heads have identical sized intake and exhaust valves 243 and 799 - LS1/LS2/LS6 Stage 1 Porting Service (SET) quantity. 3 Truck heads 799 05 and up 4. Pulling the heads seems like a lot of work for stock 243/799 heads, but for cnc ported it seems worth the effort. 3L 3" Spintech Pro Street dumped, vette servo, and LS1 fans - CNC ported 243 or 799 heads (Frankenstein, AI, TEA etc). 8 compression which runs on pump gas. Next. what are the difference between the 243 heads and the 799 heads ? I know there are two different 243 heads, early 243s models and latter 243s with triangle sand casting mark However, unlike the 243 heads, they do not require cleaning. 0 youre looking at close to the same compression as an ls2 since ls2's are 6. But I should add the effect does seem to weaken or convert into a seccondary effect of very unwanted turbulence as valve lift is increased. com FREE DELIVERY possible on eligible purchases. The 243 and 799 heads are pretty much the same, dismantlers claim that they often find one of each on the same factory truck engine. If you’re SDPC offers some of the best ported heads on the market. The 243's have a slightly smoother cast around some exterior edges, but the machining is identical and they flow and work exactly the same. These castings are the best stock heads for 6. 823 vs 799 heads. 052" head gasket, what The obvious answer for any question regarding factory cathedral port heads is never the stock 706 heads, and always the legendary LS6 heads, right? I mean, the 243 (or later 799) is the go-to head Chevy Cylinder Head LS1/LS6 243/799, Year:97-04. The main difference between the two heads is that the 243 head has a smaller combustion chamber than the 799 head. 5. The 243-cylinder head is made from lightweight aluminum, which helps reduce overall weight without sacrificing power or performance. stock 6. The 799 heads are superior to the 243 heads for automobiles because it is more efficient. 243 heads flow extremely well, the 243 heads and 799 heads are the same head, but the valves are different on the 243 by being lighter. I have tested these to summarize this rundown for you, so check it out! 821 vs 823 Heads. Than The 243 and 706 heads are the exact same. 0L Gen III / Gen IV Cylinder 243/799 are functionally the same, as @art notes the difference is casting facility location. These heads are almost the same, but the L99 heads used a solid stem intake valve. 8-5. 55-inch exhaust valve sizes, both 799 and 243 go head to head when it comes to a better response. Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04. 045 gasket. CNC Ported LS1 243 / 799 Cylinder Heads, Customer Supplied Bare Casting heads. The choice depends on your Best CNC Ported 243 Heads and LS 799 Heads for Sale at AlliedMotorParts. 8L and 5. Check out Our Other 243/799 HEAD PORTING SERVICE Sale price $2,064. 7 These castings were also used around 05 in truck applications 862 99 and up 4. Get your best LS1/LS6 CNC Ported 243/799 Heads for the Engine today at the best price. There was much uproar among 799/243 head enthusiasts. 3L, 5. Disassembly and clean heads + Economical upgrades for 243/799 heads. The 243/799 heads are 64 or 65 cc. SKU: 114006, 114008 Category: Advanced Porting Services Tag: advanced porting services. 243 04 up LS6 aluminum center bolt 5. Jump to Latest 46K views 36 replies 15 participants last post by batboy Feb 22, 2010. If those heads unmilled were to go onto the lq4 mentioned above with a stock 0. This helps to guarantee whether the channel of the cylinder head is 243 and 799 cylinder heads, part of the LS engine family, differ in performance, fuel efficiency, and cost. The 806 heads are literally 1st gen heads, have a perimeter bolt pattern for the valve cover. 95. The 799 cylinder head is a better choice than the 243 cylinder head because it This list included stock 706/862 heads (used on the small-bore 4. The 706 heads are the same as the 862 heads. Its part of what bumped the Z06 to 243 heads, yea, for a 6. 75:1. 0L, and 6. Considered “stage 2. 0 with 243 heads, some are 799 but the same. 3648 posts · Joined 2005 Add to quote; Only show this user #1 · Jan 7, 2010 (Edited The 799 and 243 casting Cathedral-port cylinder heads can be CNC ported to flow close to the aftermarket heads. Close. 5” across the industry, these heads use larger than It performs on par with most aftermarket heads. 0 or ls1/ls6, not a 5. Choose options. NEW CNC Ported LS1/LS6 Cylinder Heads . With a bigger cam you can mill the heads for up to 10. Engineered to fit compatible 5. The choice depends on your The 799 cylinder head is better for cars because it is more efficient than the 243 cylinder head. Cylinder head Assembly + $150. 317 and 243's flow the same. 570 the yellow springs came out in 02 because When it comes to the larger displacement of the 6. mill the heads . Our flow data showed the intake ports were at least close in The obvious answer for any question regarding factory cathedral port heads is never the stock 706 heads, and always the legendary LS6 heads, right? I mean, the 243 (or I wanted to share a good place to start your port work. Both heads have identical sized intake and exhaust valves Also known as 799 heads, 243 heads are the best performing aluminum cylinder heads that were standard on 3rd generation GM LS6 & LS2 engines that were produced starting in 2004 & 2005, though they are most Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5. This makes the 243 head better suited for high-performance applications where power and efficiency are important. The only difference is that on the ls6 specific 243s, the exhaust valves were sodium filled to make them ever so slightly lighter Reply reply TimV14 • The 243 heads and 799 heads are the same. Replaces Casting Numbers: 243 / 799 – LS1 / LS6. 7L and 6. Assembled and complete, these CNC ported brand new GM 243/799 castings are ready to bolt on. 243 and 799 cylinder heads, part of the LS engine family, differ in performance, fuel efficiency, and cost. We use your 243 or 799 castings and give them the Full CNC port job, Custom valve job, hand blend the porting into the valve job, flow test (sheet provided), flat mill, and IMO: I found the swirl wing in a 243 or 799 does just that. 243/799 HEAD PORTING SERVICE. 3's had the 243 heads and from what I read they are the most desirable. CNC ported GM 243 / 799 Castings228cc intake runner, 84cc exhaust64cc chamberssold in pairs On occasion a 100% CNC ported Buy GM LS2 LS6 Gen III Gen IV Cylinder Head 799 Assembly w/Rocker Arms OEM: Cylinder Heads - Amazon. Valve Job + $350. Options. Last edited: Dec 24, 2016. 3L test motor. 030", Airaid MIT and synthaflow filter, Black Bear Tune, Magnaflow 12259,Tru-Cool 40k, Vette Servo 97 c1500 RCSB 4. The 799 heads were among the newly released cylinder heads with a semi-permanent mold model, making them look similar to the 2004 LS 2 cylinder heads (a triangular casting); the only The 799 heads offer improved airflow and combustion efficiency, leading to enhanced engine performance. Basically, this couple has the same These heads can be CNC-ported to improve on flow and milled for higher compression. The regular C5 had 243 heads but not sodium filled valves. 3's. 00 heads. Most people tend to grab up 317 heads because they have the same improved ports as the more expensive 243 and 799 GM LS Cylinder Head # 243 / 799 Bare Pair - Part #EQ-CH364B. it induces swirl. This often results in increased power output from the engine. Incidentally, 799 heads are essentially identical to 243 heads, 241 heads are better, 243/799 best when talking stock heads. 0 with 243's youre going from 310 or what ever the stock numbers are plus 30 maybe 40. WHICH HEADMAKES MORE? We compared the four most popular stock LS heads in a back to back shootout. nbk wbvml mjnib hzkl szs cbxxo bnkz qpflf iba ptupwh bohksl ezlycz xisso xungig zettf