Thread: 2000 Grand Prix GT Coupe

Any noticeable horsepower gain from that? And will it make it sound a little better?

Woops, sorry theres nothing in my post about going faster. My bad. The u-bend delete you might not really feel. I put the ZZP 2.5" downpipe on mine which deletes the u-bend and adds a better flowing cat. I felt it, it was good for $200. That and some cold air together should help some.