my boi has an 02 max se and he wants to do a lil performance and i kno in the 4th gens the y-pipe does the job but is it the same with the5.5-also is it worth it to get headers with it? honeslty -how much do the headers do over the ypipe

 

Go with headers. Y-pipes for 5.5th gens suck.

 

really? thanks nailz anyone else have anything on this

 

After The bolt-ons get the S-AFCII!!! And get it tuned!!!

 

yes but which bolt ons are worth it ??? lol how much over the ypipe do the headers make?? just some numbers on both would be helpful?

 

The reason y pipes dont make as much a power increase on a 5.5 as they do on 4th gens is because we (4th geners) have the precats on the stock ypipe. So when we get an aftermarket ypipe we eliminate those precats and that's where the incredible power comes from (around 15WHP with a CAI, 11-12WHP on its own).
BUT, 5.5 gens have the precats on the exhaust manifolds themselves (the stock headers), so for them to see the power increases we see, they get aftermarket headers (which in their larger motor I've HEARD of close to 20 WHP). Someone correct me if I'm wrong

 

I've heard of 25whp for headers on a VQ35.

 

4th Gens have 4 precats right? 2 on the Y but where are the other 2. I thought it was the headers, but if that was the case then why don't headers help on 4th gens?

 

99 cali 4th gens have 2 precats and 1 cat. 1 precat on the exhaust manifold and 1 precat on the ypipe.