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The exhaust system currently available from Thiel Motorsports is an H pipe decat. I can say there is not a great deal of difference between them in power/torque . But if you are getting it tuned and AFR comes from the exhaust probes having separate exhaust makes sampling L and R easier from the tail pipe end . The first Donington decat was an H pipe , then their later offering was separate pipes decat. But in theory the H connection should be best , but I couldn't tell a difference . My bike currently is using the H pipe decat , Motad Shorties and my last dyno run was making ~ 73.5 rwhp @ 7200 rpm and 58.3 ftlb torque @ 6240 rpm SAE . Not bad really and you should be able to get this or more .

[QUOTE="TonyA, post: 672117, member: 7317"] The exhaust system currently available from Thiel Motorsports is an H pipe decat. I can say there is not a great deal of difference between them in power/torque . But if you are getting it tuned and AFR comes from the exhaust probes having separate exhaust makes sampling L and R easier from the tail pipe end . The first Donington decat was an H pipe , then their later offering was separate pipes decat. But in theory the H connection should be best , but I couldn't tell a difference . My bike currently is using the H pipe decat , Motad Shorties and my last dyno run was making ~ 73.5 rwhp @ 7200 rpm and 58.3 ftlb torque @ 6240 rpm SAE . Not bad really and you should be able to get this or more . [/QUOTE]

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