MotorTrend have done some dyno testing comparing a twin 2.5inch exhaust system vs a twin 3inch exhaust system on a...
exhaust system
Japanese performance exhaust links - Manufacturers and UK Dealers of Performance Exhaust Systems, Back boxes, Manifolds, Headers, Cat Back systems...
EVO Performance Exhaust Systems EVO Performance Exhaust Systems - Manufacturers and UK Dealers of EVO Performance Exhaust Systems, Back boxes, Manifolds, Headers, Cat...
Impreza Performance Exhaust Systems Impreza Performance Exhaust Systems - Manufacturers and UK Dealers of Impreza Performance Exhaust Systems, Back boxes, Manifolds, Headers, Cat...