I just got a J-Spec (FC3s.org -- great service!) for my 1990 GXL, and I was wondering what to do about the exhaust. Can I make the NA exhaust bolt up to the TII exhaust? If not, are the cats (pre and main) the same, or do I have to replace them too?

If it's not possible to fit that stuff together, what're your recommendations for mufflers / pipe diameter? Eventual plans for the car include a T04 60-1, Haltech, FMIC, and maybe 10-15 psi of boost. I don't mind if it's a little on the loud side either, but powerful and quiet is preferred

Thanks!,
Manolis

 

no it will not fit, you need aleast a downpipe. that might bolt to your stock main cat. the N/A mufflers will be more restrictive then the turbo ones though.