Intake Air Box Spacer for Yamaha YXZ1000 Honda TRX 400EX Polaris Sportsman 850 SP 2016-'18

Polaris Sportsman 850 SP 2016-'18 Inner (2 per vehicle)

Polaris Sportsman ETX 2015

Outlander 850 XT 16-22

Vertex pistons are perfectly suited to handle the rigors and high pressures of today's modern four-stroke engines

Polaris Sportsman 500 Duse HO 2001

Intake Air Box Spacer for Yamaha YXZ1000 Honda TRX 400EX Polaris Sportsman 850 SP 2016-'18YFZ1000 Air Intake Velocity Booster Up To + 15hp DON'T BE FOOLED BY CHEAP IMITATIONS FROM THE USA After countless tests involving hundreds of hours with different velocity stack lengths, diameters, plenum volume and shape, we are happy to introduce this new PETG (oil, chemical and heat resistant) air box spacer! The factory air box actually works reasonably well and is hard to improve upon without sacrificing power in the lower RPM areas, with this