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11-23-2009, 01:12 AM
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Senior Member
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Join Date: Nov 2009
Location: Maquoketa IA
Posts: 684
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rossier engineering all the way. Awsome quality products. there full exhaust made a big difference
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08'DS450X, Rossier exhaust, K&N intake,FMF tuner, Falcon connecting rod, 13:5:1 comp piston, WEB cams, cyl head porting,FLEXX bars,Motoworks clutch, DG double net nerfs, TAG bumper,custom graphics 
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11-29-2009, 01:03 PM
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Member
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Join Date: Nov 2009
Location: CANADA!!!
Posts: 50
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I can respond for KB Motorsports....
Excellent service FAST International shipping Great Prices! bought A-Arms and Dominator II axle from them... Shipped to Canada I Would Buy from them again Any time!
Just so you know my former forum name Was Hammo686 on rapforum.com you can keep Giving me Sweet Deals KB!
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11-29-2009, 09:05 PM
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Supporting Vendor
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Join Date: Aug 2009
Posts: 105
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Quote: Originally Posted by blaster99
The motoworks pipe that the national guys use. Its 96 db. It also apparently makes more power than the regular system.
I would go with the Motoworks if it's at 96db. Sometime in the future your going to notice your local tracks getting strict about exhaust noise. For some odd reason it seems like the Motoworks exhaust I heard on a DS450 locally was loud. I didn't get the impression it was quiet by no means? However, I barely got a chance to hear and see it run.
DS450 Exhaust
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11-29-2009, 09:58 PM
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Senior Member
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Join Date: Nov 2009
Location: Maquoketa IA
Posts: 684
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yea my rossier pipe is loud as $hit when i race i use the quite kit. Still a awsome pipe
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08'DS450X, Rossier exhaust, K&N intake,FMF tuner, Falcon connecting rod, 13:5:1 comp piston, WEB cams, cyl head porting,FLEXX bars,Motoworks clutch, DG double net nerfs, TAG bumper,custom graphics
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12-05-2009, 12:37 AM
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Senior Member
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Join Date: Dec 2008
Location: Ontario Canada
Posts: 411
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The Motoworks has a quiet insert that brings it down to 96 but not many people use it. It comes with the pipe though. I had mine sound tested at all the races and I was between 99 and 101, +/- 2 db. They are pretty loud pipes.
Dirt devils, did the rossier quiet kit effect performance at all?
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12-05-2009, 10:17 PM
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Senior Member
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Join Date: Nov 2009
Location: Maquoketa IA
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i didnt notice any real power loss. I dont have any dyno #s to prove it though. Works for me when track owners like to complain lol
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08'DS450X, Rossier exhaust, K&N intake,FMF tuner, Falcon connecting rod, 13:5:1 comp piston, WEB cams, cyl head porting,FLEXX bars,Motoworks clutch, DG double net nerfs, TAG bumper,custom graphics
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12-07-2009, 08:49 AM
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Super Moderator
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Join Date: Feb 2009
Location: West Springfield MA
Posts: 1,605
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Quote: Originally Posted by KB Motorsports
Quote: Originally Posted by blaster99
The motoworks pipe that the national guys use. Its 96 db. It also apparently makes more power than the regular system.
I would go with the Motoworks if it's at 96db. Sometime in the future your going to notice your local tracks getting strict about exhaust noise. For some odd reason it seems like the Motoworks exhaust I heard on a DS450 locally was loud. I didn't get the impression it was quiet by no means? However, I barely got a chance to hear and see it run.
DS450 Exhaust
Its not the one that comes with the racer package. Here is a picture.
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12-27-2009, 09:24 PM
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Junior Member
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Join Date: Dec 2009
Posts: 9
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i was lookin at motoworks but i looked at three place and all three told me the pipe and fmi is on a 30 day back order
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