I have a GMPP cat back I was wondering what would be the best header/down-pipe combo to go with it?

 

id say zzp makes the best header-dp combo . good price and good quality.

go 1 3/4" primairies to a 2.5 dp..thats what ive heard works best..

 

awesome...that wont make too much back pressure will it? also will it keep its deep sound as well

 

you want back pressure

 

oh really?

 

if you dont have back pressure you will lose a lot of low end.

 

oh ok...thanks i didnt know that

 

Um, no.


Its not the loss of backpressure. Its when the exhaust velocity is low that you lose your low end power.

Backpressure robs you of power.

 

Yeh dude, well i am going with the zzp header downpipe combo with a cat to stop the raspyness. I am going to go with the 1 3/4" header and a 2.5 DP then install the wideband gauge so be kicking. Ohh yeh i also have a magnaflow muffler