Spark Arrestor Full Exhaust System

The unique attributes of the Dr Drsquos step system allow for a more efficient intake stroke It does this by resisting the reflective exhaust pulse during the intakeexhaust overlap In plain language the carefully tuned steps in the system allow for a lower net cylinder pressure which gives a crisper throttle response from bottom to top The key advantage of the Step System is improved low end response with substantial gain in the mid and top ranges Dyno tests show a 36 horsepower increase at peak