Originally Posted by 150ron
Ran the MRD/SSW pipe today with only the spark arrestor (removed quiet core), tis louder for sure, but definately gained some power.
Bet it didn't... at least nothing appreciable.
You're probably feeling a more abrupt change in power as it climbs out of the bottom end / mid-range hole created by that pipe. It really needs at least cams and carb before it starts to work properly.