Alloy tube is specially designed and developed to adjust flow so that the engine gets improved bottom power at part openings, plus better and smoother throttle response without re-mapping the ECU. The ProX Velocity Stack will significantly improve drivability and increases torque at the lower rev range, exactly the area where the power is needed!

KTM 250 SX-F (2011-2012), KTM 450 EXC (2012), KTM 250 EXC-F (2012), KTM 350 SX-F (2011-2012), KTM 350 EXC-F (2012), KTM 500 EXC (2012),

PROX 38.VS6001