Does the stock exhaust really restrict flow of GSR's? B/c my friend has a big mouth exhaust on his LS, a CAI, and DC headers and I beat him but he will now and then pull on me but cant beat me and I just have comptech header, comptech intake and eibach pro-kit. Once I get any exhaust would i really be able to finish him?

 

You won't totally finish him like leave him five car lengths back or anything. It won't make too much of a difference - 1/2 a car length or so.

 

thats not any exhaust thats that rs*r exhaust biiaaaaaaaaatch!

 

huh?