i thought the hissing noise was a pop charger lol mine sounds like that

 

mine does too, like at 3000 to 2000 drop but the sound and performance is the best bang for the buck. I took a guy by a car length up a hill with my gf in the car. He had same mods cai, cat back but i had test pipes. Test pipes FTW

 

No problems with my test pipes. Did the non-fouler mod, no cel.

 

ya i have the stock y pipe and stock exhaust. No rev up motor..mine's auto...plus there is no aftermarket popcharger....everything's alll STOCK except for testpipe.

just to let you people know what i got.


edit: i did the nonfouler also, no CEL or anything after 1000 miles..it's been great!