Reviewed By Richard D (Moss Point, MS) Reviewed for a 2006 Hyundai Accent —3/11/2013 9:08 PM
I was surprised that there was an increase in power and in the smoothness of the engine at low revs. Combined with a low restriction, but not loud, muffler/tailpipe combo, it feels like I have gained 8-10 horsepower. I do not notice any improvement in mileage. The real notable difference is how smoothly it pulls in low revs, making downshifting (5 speed) optional at times.