The OEM Diffuser is adequate for a lot of riders. it doesn’t limit flow and can be port matched to the Exhaust Base. If you’re looking for the next step in performance look not further than ExpansionMax. This pipe like design will help direct some of the sonic waves back to the engine and maximize this area. We maxed out all dimensions without restricting flow (with a Tall Can). ExpansionMax is thus a nice upgrade for this area and has matched performance of a WPS pipe in some applications. We recommend you port match the 2″ ID of our diffuser to the exhaust base for maximum potential.
Engineering Summaries Below:
Full Wetbike Exhaust System Flow Path Optimization
Flow Max Engineering Summary
