What’s the difference between 90-91 and 92-93 Exhausts? and headers?
Is one longer then the other?
Can any header fit? or are they year specific?
The header on the 90-91 is longer than the 92-93 and the O2 sensor is close to the head while the 92-93 is close to the cat converter.
The cat converter is the same size on 90-91 and 92-93
The resinator pipe on the 92-93 is longer than the 90-91 by about 3 inches (or maybe less).
You can install a 92-93 cat back exhaust on a 90-91 but you have to buy an aftermarket cat converter and have a muffler shop cut it down about 3 inches. That is how I got the 92-93 DC Sports cat back to fit on my car.
So if I go with an aftermarkey header would I need any extra pipes to add on? or change?
I have a 90 LS right now, but if I get a new header would I have to add some more pipe to make it longer? or would I have to swithc to the 92-93 style exhaust too?
Originally posted by SerialOne
[B]So if I go with an aftermarkey header would I need any extra pipes to add on? or change?
I have a 90 LS right now, but if I get a new header would I have to add some more pipe to make it longer? or would I have to swithc to the 92-93 style exhaust too? [/B]
Just get a header made for a 90-91 and you’ll be fine. Same with the exhaust. If you do that it’ll be a simple bolt-on process.
some one on this board informed me that 90-91 four doors fit 92-93 two doors. I have a 91 four door parts car, and used the intermediate pipe from the four door on my 2 door- it fit fine. That was some very useful info for me- maybe it applies to you too.