Quote:
Originally Posted by NinjaRacer
I've heard that you need to go two sizes up for exhaust and two up with pods.
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For pre-gens maybe, not new-gens. Factory airbox and air-filter is plenty large for a 250cc engine, larger than some autos. So replacing with pods won't improve flow much since there's no restriction there. Perhaps if you had extreme high-RPM cams on a pre-gen perhaps. Certainly won't do anything on a new-gen where tuning doesn't depend upon high-RPM flow anyway.