i have a 97 firebird with the LT-1 i have mac short headers and a 3 inch y pipe and also a flowmaster muffler but i have the stock I pipe and the only thing i can find to buy one by itself is from summit but its for an ls-1 would it work it looks identical ? or would i have to go get one custom made the I pipe from summit comes in 2 peices and together its only like 95$ its made by dynomax

 

Buy a whole new cat back...If you upgrade to a bigger I pipe only your over the axle pipe is still 2.5 inches and is going to stop the performance you would gain from the I pipe. If all you have is a flowmaster muffler it isn't doing anything for performance so just put a whole new system on.

 

i think he means from the Ypipe collector all the way back to the muffler inlet. since he mentioned it was 2 pieces.

i'm trying to remember how different the LS1 setup is from the dual cat setup on your 97. i don't think it's much...wouuld probably work.

call up dynomax...or call summit, they may have them but not list them.

i also know you can get the pipe from mac

 

im saying i can buy the I pipe and the overaxle for 95$ but its for a LS-1 i was asking if it was the same and would work for my LT-1 car?

 

It's gonna be to short. The y pipe is different.

 

Go to the Dynomax web site and look under GM Products. It will give you a PDF format list/diagram of all there F-Body exhaust stuff. Get the part numbers for the I-pipe there.

 

maybe get an adapter made? is the overaxle still the same length? could i use that and get a custom I pipe made?

 

the over-axle part will be identical.

if you were to attach it to a muffler...run it over the axle and towards the front of the car...the LS1 pipe would end short of the LT1 ypipe. a simple piece of pipe would sufice for the "adapter"

 

so i would need a peice of pipe to go over a 3 in od pipe so it would be like 3 1/4 id pipe i think but other then that it would work? what about the hanger on the overaxle would i need anything special to make it work?

 

I had a 97 Z28 before this car. I reused the GMMG from the 97 on the 02 with no adapter. It bolted right up to the stock Y-pipe. I had to have a hanger made for the driver side tail pipe because the hanger is different for LT1 and LS1 cars. The I pipe became the same length in LT1 cars as LS1 cars in whatever year it was that they got dual cats.

PJ

 

alright cool well my muffler is already on i just dont have a 3 inch pipe between that and the y pipe so im looking at getting one summit has both peices the overaxle and I pipe total it will be 110 shipped for them both instead of 200 muffler man wanted to make me the same **** except they would make it one peice instead of two but i guess two peices is a easier install

 

It will work. The 1996 and up I pipe and over the axle pipes should all be the same.

 

i knew it was close...

all i know is the 93-95 single cat pipe will be WAY off...they needed a big S bend to get up to the ypipe.