Aircleaners Breather Kits

14 products

Crankcase breather kits from MCS, Vance & Hines, and S&S for Big Twin, Sportster, Twin Cam, and Milwaukee-Eight — routes blow-by vapour through a filtered breather rather than back into the intake. Essential when fitting an aftermarket aircleaner that doesn't handle stock breather routing. An unmanaged breather dumps oil mist into the airbox and onto the rear cylinder.