Same external pattern as the VOC Spiral Baffle Silencer but straight through with packed with absorption material
Independently dyno tested giving 6BHP increase over a cheaper pattern spiral baffle silencer. See detailed report in MPH 641.
Comment from a customer,
"Thanks for sending my new silencer and oil filter, they came very quickly. I fitted the silencer to my D with no problem. It' a little louder than the one I took off but not offensive. Seat of the pants dyno test reveals an appreciably quicker pick up and improved performance overall.
The bore of the central tube is larger than that in the one I took off so it must have been restricting bike somewhat although the bike ran well, it is now crisper. Thanks "