ALPINESTARS SMX-1 R v2 Boots - Black/White - US 8 / EU 42 2224521-12-42 Midway Drag Pipe Mount Clamp 4kW is a new replacement

4kW is a new replacement unit for stock and slightly modified engines

Most aftermarket mufflers will fit

The exhaust valve race uses the factory exup hardware alongside the Graves EVR valve and custom mapping to improve low to mid-range rpm and small throttle opening torque and drivability to create and better powerband and ride

Use with FMF or Stock OEM Header

Approximate 6" (EU: 15

ALPINESTARS SMX-1 R v2 Boots - Black/White - US 8 / EU 42 2224521-12-42 Midway Drag Pipe Mount Clamp 4kW is a new replacementA class leading, low cut performance riding boot, the SM 1 R v2 Vented Riding Shoe incorporates a host of technical innovations for improved levels of comfort, fit and durability. Constructed from a lightweight and abrasion resistant microfiber upper with extensive perforations for maximum airflow and breathability, the shoe is also equipped with strategically positioned TPU protectors for abrasion resistance in a key area. The SMX 1 R v2 Vented