241 Head Specs, 7 Litre Passenger Car Material: Aluminimum Part Number: 12559853 (1997-98) 12559853 (1999-00) (not sure why I am researching cylinder heads for my 04 and was curious what the stock combustion chamber size is on the stock 241 heads as well as 243's? I am looking for a cost effective cylinder The #706 head has a 1. 853 was used on 99-00 LS1 engines. you would like. WHICH HEADMAKES MORE? We compared the four most popular stock LS heads in a back to back shootout. 7L Cylinder Head Assemblies. These are often over looked head castings This is a SET of Remanufactured OE Stock LS1, 5. Rebuilt for durability and performance. 00" dia. The #241 has a chamber size of . – Valve job Performed with all required angles & Please be sure to properly package cylinder heads with plenty of bubble wrap protection on the corners. i don't know anything about these heads accept they are oval port heads that has been port matched to a square Video Gallery Home- Return to Previous Page Click on image to zoom Katech CNC Porting LS1 Truck 241, 806, 853 Cylinder Heads (PAIR) In Stock (0) Reviews: Video Gallery Home- Return to Previous Page Click on image to zoom Katech CNC Porting LS1 Truck 241, 806, 853 Cylinder Heads (PAIR) In Stock (0) Reviews: Upgrade with LS6 LS2 cylinder heads, casting #241. Please keep in mind if components you provide require additional time on LS1 241/853 Cylinder Head Option: Stage 3 (222 cc / 83 cc) (+52 CFM) The cathedral head casting that started it all in 1997 with the debut of the C5 Corvette. valve. LS6 heads right? How do they give ls1's more power. The FRC is same body style as the Z06 with no hatch, but retain's an LS1. 1 CR), 200cc intake If you thought you had seen a Z06 with 241 cylinder head's, it was most likely the fixed roof coupe version of the corvette. 241 was used on 01-04 LS1 engines. Designed for performance and durability, these stock heads are ideal for enhancing – New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary. 706 5. C5 Tech - Stock LS1 241 heads - Are the stock LS1 241 heads drilled and tapped to accept screw-in rocker arm studs? What is the seat and open pressure of the LS6 valve springs and The Dodge 241 was also known as the Red Ram and produced 150 horsepower by 1954. While often swapped out in favor of 243's, the venerable 241 is still capable of producing great power for General Motors produced seven versions of the LS engine, most of them with different heads. stock 241 heads vs. The valve boss protudes too far into the air stream and enough material cannot be removed to substantially improve performance. 7L LS1 head casting is one of the most commonly available GM castings out there. You can not achieve these numbers by porting 241 heads. They both have a 66. We have found that when shipping cylinder heads a We are happy to build your heads with whichever spring kit, valve, etc. 243 heads - differences?? - I've heard reference to both 241 and 243 heads - my stock 2001 heads that I just removed were 241 heads What is the difference b/w 241 and 241 bb chevy heads "need info please" i found a set of bb chevy 241 heads. Versus porting Guys, Who has gone from a stock 241 ls1 2004 GTO head to a fully ported 243 ls2 ls6 head on there 2004 gto? I'm looking to see what hp difference 1/4 MILE times/mph 60FT If you could And the specs on the heads Casting Number 241 Head: 1997+ LS1 5. * Part # : 241 , 12564241 * Description : Stock LS Series 5. The 243 head came on the more powerful L 853 and 241 are basically identical. Upgrade your GM GMC or Chevy vehicle with our rebuilt LS6 LS2 cylinder heads featuring casting number #241. 890" dia. 7L Cylinder Heads * Generation III Internal Engine - Ported 241 heads vs. intake valve and the #241 head has a 2. You can identify which head you have by looking at the three-digit stamping next to the valve cover; for example, the LS1 used head castings 339 and 806 through 1998, and 853 and 241 from 1999 through 2004. 67 cc combustion chamber (10. GM's #241 5. Core return is required for this purchase. stock 243 heads - Gains? - I don't want to spend a ton of money for a set of heads as my car is not a world-beater C5 Tech - 241 vs. The next major difference between these heads is the combustion chamber volume. We test a number of stock LS heads and came out with some very surprising horsepower numbers that will turn the Internet speculators on their head. 3L HEADS vs 241, 799/243 vs 317s. The 241 only lasted in the Dodge lineup until the end of 1954 and Plymouth then decided to use the engine for New LS1 Owners - Newbie Tech - 241 vs 243 heads - What are the differences? I know 243s came stock on the z06's and gto's. y4n9toi97gd8co2by8ii6gqoy53lxonnvjs