MUFFLER PC4 YFZ450 04-09/12 Subzero The Allen key bolt secures

The Allen key bolt secures the kick start to a S45C steel base that fits onto the spline

Improved feel and smoothness

Pre-Oiled: Yes - Pre-Oiled Twin Air Ref: 153910X Fitment Summary

When needed

MUFFLER PC4 YFZ450 04-09/12 Subzero The Allen key bolt securesPowercore 4 Slip On Muffler FMF developed the PowerCore 4 to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding Aluminum construction and stainless steel Hi Flo endcaps make for the perfect balance of performance and strength Removable spark arrestor included NOTE: Will not pass 2025 FIM sound regulation Specification Type: Slip On Muffler