243 Heads
Thread Starter
Instructor
Joined: Dec 2015
Posts: 166
Likes: 26
From: Oviedo FL
243 Heads
I'm going to be having a cam and supporting mods, along with full exhaust installed this month. I'm thinking about having the heads done at the same time.
The question is this: there are 243 heads available for sale all over the place. Will a 243 from a 6.0 truck engine or other bolt up to the LS1 without issue?
Is it worth doing or just nice to talk about?
Car is 2003, LS6 intake already in place, has original TB, and has dual cone cold air intake?
Suggestions and recommendations from those who have been there and done that or are in the know are much appreciated!
The question is this: there are 243 heads available for sale all over the place. Will a 243 from a 6.0 truck engine or other bolt up to the LS1 without issue?
Is it worth doing or just nice to talk about?
Car is 2003, LS6 intake already in place, has original TB, and has dual cone cold air intake?
Suggestions and recommendations from those who have been there and done that or are in the know are much appreciated!
Thread Starter
Instructor
Joined: Dec 2015
Posts: 166
Likes: 26
From: Oviedo FL
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
243 heads are 243 heads regardless. 799 heads are the same castings with a rougher sand casting instead of the die cast of the 243's. The 799's can be had a little cheaper.
So the answer to your question is yes. I know because they are working fine on my car.
So the answer to your question is yes. I know because they are working fine on my car.
Last edited by Rob 02; Jul 6, 2017 at 08:56 AM.
Thread Starter
Instructor
Joined: Dec 2015
Posts: 166
Likes: 26
From: Oviedo FL
Thanks for the info. Same valve covers and coil pack brackets used? Any real difference in these vs. the originals? (241s for originals I think?)
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
Same everything is used on 243's...I just did the swap over the winter from the stock 241's.
243's flow a lot better than 241's. And if you're doing a cam, that increased flow makes much more of a difference.
I bought CNC'd 243's from Livernois. I looked into just bolting on a used set with a valve job and a cleanup, but ultimately CNC'd 243's are surprisingly common and not much more expensive. You're looking at $1k-1.5k for the heads, but I think it's worth doing. My car with a BTR Stage 2 cam absolutely rips, especially up top where the flow numbers make the biggest difference.
243's flow a lot better than 241's. And if you're doing a cam, that increased flow makes much more of a difference.
I bought CNC'd 243's from Livernois. I looked into just bolting on a used set with a valve job and a cleanup, but ultimately CNC'd 243's are surprisingly common and not much more expensive. You're looking at $1k-1.5k for the heads, but I think it's worth doing. My car with a BTR Stage 2 cam absolutely rips, especially up top where the flow numbers make the biggest difference.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
Like the others said. Everything matches up exactly. The 243/799 heads flow better, have better combustion chambers and higher compression ratios than the 241 heads.
Burning Brakes
Joined: Jul 2013
Posts: 935
Likes: 103
Thanks guys I'm new to the internet. Well time to log off. I'm expecting a phone call and can't be surfin while this 33.6k modem blocks my phone line. I'll try to get on Netscape Navigator again tonight and look for these 243 heads that are everywhere.
Last edited by Roddy13; Jul 6, 2017 at 06:42 PM.