Anonymous asked in Cars & TransportationCar MakesPontiac · 1 decade ago

Grand Prix Single Exhaust to Double Exhaust, Any Difference?

I have a 01 grand prix se, came with one exhaust, im thinking of adding a y connector and adding another exhaust to have double exhaust, im doing it mostly for the look, but i wanna ask is there any HP gain or loss, or any downfall or gain in doing this? any help is appreciated thanks

2 Answers

  • 1 decade ago
    Favorite Answer

    this is a great idea. dual exhuast will increase your horsepower, and it should help your gas mileage. and yes it does look good and it will sound sweet if you get a loud muffler. there are really no down sides to this. and while your at it, if you want to add more power, then toss on a free flowing catalytic converter. so you should feel the power. no down sides.

  • In theory, it will let the exhaust flow slightly better. The exhaust will be split to each exhaust which should decrease back-pressuree. That should increase power and possibly fuel economy. But it will add some weight which may cancel out the benefits considering the weight of the extra hardware.

Still have questions? Get your answers by asking now.