stock exhaust? why? to block everything up and lose power again? and dont start with that backpressure bullshit because backpressure is not good for anything
If i knew how to make the smiley guy slap the other guy then i would do that.
If backpressure is such bullsh!t then take off your Greddy cat back and use no exhaust......while your at it take off your headers to.....You wont have to worry about backpreasure anymore.... Im sure you will be happy with your results!