I just bought a second hand G. The ex-owner's put a FGK exhaust. But i 'm not sure the Y pipe is stock or aftermarket. Does anyone can post up original stock Y pipe PICS. And tell me what's the pipe diameter. Thanks!

 

http://www.my350z.com/forum/showthre...ghlight=y+pipe
check post #10 from a thread on my350z.

 

I have a 03 coupe and I'm glad I've found this thread. thanx

So there is a slight improvement from switching out the OEM Y-pipe since there's flow restriction from the crush bend.
But the problem with most aftermarket y pipe is the 80mm outlet, which mis-match when install with stock midpipe/B-pipe.
So unless I run an aftermarket exhaust, otherwise Tanabe Y-pipe has the closet outlet match to the stock midpipe? Is that correct?

 

the tanabe is still a few mms too big but still alot better than most others offered. the best matchup is an hks y pipe but for most places, its a special order and takes 4-6 weeks. most vendors that ive contacted said it was impossible to get ahold of one.