ORIGINAL: Razor-RCU
Howdy Flyer- The black Macs muffler is a waste of money. get a Tower muffler or a Ultrathrust/ Jett muffler if you want to improve over stock performance. Also, I would not run the HS-55 in anything other than my little foamie's. Not sure if other folks use them for THR. though-
Keep us posted!
If there is any vibration transmitted through the linkage the gears will go bye bye in a hurry!