The stock Rev 600 SDI muffler weighs just shy of 15 lbs. This new Full Velocity Lightweight Muffler from Bikeman only weighs 7 lbs! Go ahead and have another cheeseburger, this muffler saves the weight for you. You also get more throttle response and quicker acceleration without losing peak power like some competitors mufflers. This fully baffled design gives it a nice tone without having to break out the earplugs. Fits all 2003-07 Rev 600 SDI models with the temp sensor. Available in high temp black or ceramic chrome. No clutching or EFI modifications necessary.