The product of state-of-the-art technology and extensive real-world testing, Pro Circuit 4-stroke systems boost overall performance with explosive bottom, mid-range and peak power. And because they re constructed to withstand even the most abusive conditions, these systems are sure to give you years of unrivaled performance off road or on the track.
Revolutionary new system uses a longer aluminum body and special internal E-glass packing to lower noise output to legal dB without sacrificing power
Produces an impressive gain in horsepower when compared to OEM
Stainless steel intake tube and FIM-approved end cap
Completely hand-assembled and -welded for a fit and finish that would rival any Factory Works part