I have a 2002 V6 camaro, stock, i am going with duel magnaflow, but what size pipes? i was thinking 2.5", but im not sure what size will sound better.

 

Yeah that's what i would personally go with. 3" way to big and 2.75 is just nice too, but I like 2.5 for the sound, performance, and gas milage. These EFI caars need backpressure to work right, or the air charge will enter the cylinder and exit through the exhaust valve w.o back pressure wasting gas and performance low end.

 

I already showed you my duel magnaflow in another post but for your piping question, here is what I have on mine. I'm not sure if it's 2.25 or 2.5 but you definitly want to keep your back pressure. (this pic is through my rear left wheel well, it's the piping after the muffler and before the tips.

[IMG]local://upfiles/3932/274B9F38162E43F09B8810E57DE2AE96.jpg[/IMG]

 

ok thanks, i think i am gonna go with the 2.5". But what about the 2.75"? because i dont want to lose back pressure and performance.

 

2.5 has more back pressure then the 2.75. 2.5 will give you more low end performance and a better sound. 2.5 will still flow way better than the stock exhaust so don't worry. My truck has a 3" because i like torque. Any bigger would have just added power top end but not down low where i wanted it. 3" is big enough for a 350, 2.5" is more than big enough for a V6.

 

ok im gonna get the 2.5".