Pro Circuit 304 Exhaust Silencer - Yamaha YZ250 1988 | SY88250-304 Custom HFI is the backbone of

HFI is the backbone of each Supercooler's final design and it is based on the process of correcting the in-efficiencies and production-based limitations found in the design of stock waterpump systems

Designed specifically for the X3

Big Dog Coyote 2009 to 2011

Most brand-new machines don't look that way for long

Mid-sole foam for damping effect

Pro Circuit 304 Exhaust Silencer - Yamaha YZ250 1988 | SY88250-304 Custom HFI is the backbone ofFits The Following Bikes: Yamaha YZ250 1988 Silencer Description: The 304 silencer is recommended for most two stroke applications. The slightly longer body offers added top end performance while reducing noise output. The brushed aluminum body and stainless steel inlet tube and end cap gives you a silencer that looks as good as it performs. Features Include: Longer body design helps to reduce noise output 6061 T6 brushed aluminum silencer body