Resonance tuning - sounds like a bit of a gimmick when you first read it, huh? Air flowing through exhaust piping is all headed one way, and from what we've all come to know, the faster you can get it ...

As much fun as it is to prove or dispel tuning-related myths and misconceptions, we must admit: it's always more fun to put sketchy products with bold claims to the test. Sure, both set the record ...