i ordered my pipe last tuesday and recieved it on friday, i ordered the muzzys slip-on system. I paid $360 and i will tell you what it was worth every penny. Me and one of the mechanics from my work installed it in a bout an hour and a half and when we got done and reved that baby up it was sweet music to my ears. it is more of a deep throatier sound than any other pipe i have heard but i like it. Loud and deep it sounds great and i am impressed because i haven't heard anybody putting that pipe on there 636 so, here it is just to let you guyz out there know that the muzzys exhaust is worth it!!!! ill post up some pics here soon as i can.