Join Date: Jun 2014
Location: Sydney, Australia.
Cobra Power Pro HP needs quietening down.
Guys, I've lost track on where and when over the past 4 weeks I've asked about this so forgive me if I'm repeating.
That said there are updates to mention.
The story thus far is, I purchased a 3000 mile old Hammer S with a stage one kit on it. This included the Victory Performance badged, Cobra manufactured Power Pro HP 2-1 pipe which says "Closed course use only".
I picked the bike up and the sound was loud. So I set about getting the tools and popping out the "baffle". In essence it's a megaphone with a 2 1/2" wide section of packing area. Now I have asked Cobra for any clues and they've been as helpful as they are in a position to be.
Suggested was an after market baffle and thus I bought a SmartPartz baffle / DB killer. This in reality is a plug that reduces the exhaust output hole size from 2 3/16" to 1".
Having drilled and screwed the SmartPartz in place I replaced the burnt and partially blown out packing with Ceramic Fibre packing. Put the pipe back together and whammo.... I still need ear plugs to ride to avoid getting a headache.
I was actually worried the SmartPartz baffle would quieten the sound too much. To give you an idea the sound whilst cruising at 2300 rpm is fine but head into a right hand corner and accelerate out and the pain begins. Whilst not being as loud, the profile of sound is just like a Top Fuel drag car. That and it pops and crackles on overrun.
So I'm not sure what other aftermarket pipes would have a suitable volume output since I read all the time of people wanting to make their pipes louder.
I swear it's thumping 120 db plus at the moment but I'm yet to measure it with my phone app.
That said has anyone else had any experience with this pipe and getting it quietened down.
I love the smell of Freedom in the morning... smells... smells like... Victory! ©