y does my exhaust pop when ever i downshift or wen i let go of the gas

 

good question i donno but mine does it all the time, every time i start up, down shift, get off a hard boost and lots of time

 

it sounds like i have something crazy under the hood wen it happens and ppl hella turn their heads

 

mine will back fire so loud, but when i get off boost i just hear loud girggles and then a loud pop

 

why does this happen? does it mean its running rich

 

put a resinator on then it will stop.

 

pfft that reduces performance and i like the sound

 

o its the resonator. does ne one notice there decrease in mpg after they got exhaust.

 

well i got worse cus i got more power and used more gas

 

The backfire noise is just because of your less restrictive exhaust and less turbo backpressure i have 3" test pipe with 2.5 straight through with a gt28r setup and it will knock a flame out on the highway when i get on it. =)