NoeVuh

Not too long ago me and friend took the main cat off and hollowed it out to make a better flow and sound. It does sound better, not sure if there is any horsepower increase but now when i am going and rev it out to about 7500 RPMs it back fires alittle, is that hurting anything? Does hollowing out the cat give me any more horses?

drunkin_idiot

It might, but actually taking off ur carts will especially on a turbo, it will backfire like crazy that way, shootin mad flames yo.