If you own a ‘17+ V7 III, V9 or V85TT, they all have an air feed circuit to the exhaust port of the cylinder heads. The system is part of tricking tail pipe emission testers into thinking its running leaner than it actually is. It’s also a likely failure point in time as it is a plastic pump with rubber hoses, and part of the cause of closed throttle popping if you modify your bike (outside of the major fueling issues). Recommended to be used with our Performance Flash. The block-off kit...