i bought a bolt on fully stainless steel made by a company called torque and i felt significant gains. it was also mandrell bent. it is full catback and looks awsome when you get under the truck and see the shinning pipes.

 

I Used To Have All Stainless Straight Pipes, Lol, I Just Got The Hookup.

 

Got my Summit catback installed tonight.It was not to hard to put on.It is pretty quiet,not much louder than stock.This is what I was looking for,now to get the cutout installed and let it be loud when I want too.