Exhaust

Aftermarket mufflers work by providing lesser sound suppression - this makes your car sound louder and more aggressive but don’t expect any horsepower gain.  On the other hand, aftermarket exhausts are significantly less restrictive and also come with an aftermarket muffler -  which means they improve both horsepower and sound. …

Both muffler delete and straight pipe can provide minor horsepower improvement (5-10 horsepower, depending on the car). Power gain should be more noticeable on higher RPM.  Both muffler delete and straight pipe does not help a lot with gas mileage but they do provide a much louder car - which…

Exhaust silencers typically reduce the performance of your car by a little. Removing exhaust silencers through “muffler delete” can gain you 5-10 horsepower.  As for gas mileage, exhaust silencers do not impact gas mileage enough for it to be noticeable. Exhaust silencers do add some backpressure that could theoretically reduce…