MotorTrend have done some dyno testing comparing a twin 2.5inch exhaust system vs a twin 3inch exhaust system on a...
exhaust calculator
This page contains 4 exhaust header calculators. They calculate header primary length, header primary diameter & area, collector diameter and...
This page contains two calculators. The Helmholtz resonator calculator below will tell you the hypothetical ideal length of a quarter...
This exhaust pipe size calculator will tell you what exhaust pipe size (diameter) you need for the horsepower you are...
