I got some question and i need advice!

I installed greddy tic about 6months ago and i want more mod on

exhaust. that was my first mod for my g37.

I think i have many choices but i couldn't decide. If i want to better sound

and louder sound, what should i have to install HFC or Y pipe?

Also which brand would you recommend? or other opinions?

 

Test pipe

 

Listen to wie ^ he's had everything they make for our cars lol

 

Why not a full cat-back?

 

isn't it illegal? what about hfc? does it make big difference? any power gains?

 

Test pipes and HFCs are both illegal. So are exhaust and intakes... Most things are lol

 

oh i thought just test pipe is illegal..

 

federally, non-oem cats (including HFCs) are illegal unless oem is no longer available. in california, non-carb intake/exhaust parts are illegal from what i understand.

 

Test pipes are illegal. High flows are legal in 49 states except calif