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tft
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Joined: 11/06/2011
Posts: 44

I'm not a huge fan of the exhaust on my /5. Anyone have a good buy as far as a 2 into 1 exhaust. Any performance loss or gains? I'm also thinking of just pulling the mufflers for the time being. Mostly to irritate my neighbors. Any performance loss there?

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6327
My general thought is that

My general thought is that modification of the exhaust system will result in some loss of performance, although it might not be noticeable until you get near max RPM or maybe it will be down on torque or something. Maybe only visible on a dyno... The BMW engineers probably made some compromises in their overall design, but they probably did a pretty good job. So, modifying it will likely result in some changes. You'll probably need to monitor plug color to ensure that the jets are correct for the different way the engine breathes.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

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