Best Exhaust...

[91GSXR]

I know this seems newbie'ish, but I'm not a newbie. I am looking to buy a cat-back exhaust system for my 91 GSX. I was wondering if anyone knew what system gains the most horspower. I am looking at the Greddy SP and the Apexi N1, but I'm open to all suggestions. Thanks a butt load.

 

[Black95GSX]

Greddy's neck down at the cat... I'd go for apex simply because they use a removable reducer -- that way when you later take care of the downpipe, the cat-back will be a true 3" --- which will NOT be the case with the greddy

 

[tsibribri]

i personally like my apexi n1 catback and i cant wait till my apexi dp comes