Can anyone attest to horsepower improvement on any after market cb1100 exhaust?? Or, do they just make noise.
Are we talking slip on muffler, or full pipe getting rid of the cat?
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Loosing the cat will defo get you more horses... how many will depend on what else you do to it but they will be there for the taking.
Got 97.somthing at the back wheel with other mods.