ALPINESTARS SMX-1 R v2 Boots - Black/White - US 12 / EU 47 2224521-12-47 Bionic Flex Knee Protectors 5" inch muffler bodies include

5" inch muffler bodies include a quiet baffle with additional silencing material

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port

Exclusive E-glass pillow packing (extra packing included)

Combined with Graves’ exclusive flash tune map this system produces improved midrange and top end horsepower over the lower mount systems

Can be installed with the original muffler without making any changes

ALPINESTARS SMX-1 R v2 Boots - Black/White - US 12 / EU 47 2224521-12-47 Bionic Flex Knee Protectors 5" inch muffler bodies includeA 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