Well I started the 72 today and all is good. Now for the break in I used the stack manifolds, but they will be coming off in the next day or too, and a new set of ceramic headers will be going on. Now the question is should I go with a 2 1/2" exhaust system or a 2 1/4 system. I have new flowmaster 40 series mufflers that are 2 1/2" in/out. I can use them either way as the system will be custom bent. The engine is a 383 stroker bored .040 with a .480/.490 lift hydraulic cam. trans is a 2004r with a 3000 stall converter. I'm thinking stay with the the original thought of a 2 1/2" system but was wondering what others thought. I already replaced the original trans cross member so that wont be an issue.
Vette(s): SOLD - "The Toy" - 1970 Convertible SOLD - "The Beast" - 1990 ZR-1 (#682) "BLKBRRD" - 1978 Trans Am, 400ci/285hp, 4 spd, Black w/black interior, Hurst t-tops
When "The Toy" needed pipes a few years ago I went with the 2 1/2". Kept the original exhaust manifolds though - which are 2". Crazy part was the mufflers were 2 1/2 going in and 2" coming out. They didn't make 2 1/2" bezels back then.
____________________________________ Jim Olson "The Toys"...!!! Save the Wave!
Anyway. I installed a Magnaflow system on my 73. It comes out of the stock manifolds at 2 1/4" and enters a X-pipe which increases the pipes to 2 1/2" all the way through to the mufflers and out the back staying at 2 1/2".
The system is Stainless all the way.
I did have to modify the mufflers outlet to except a tip out the back of my car to match the original setup. I then purchased tips with the 2 1/2" pipes.
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