G4 KnockLink Kit - Includes Knock Sensor+Loom (G4KNLK)Kit includes the G4 KnockLink visual warning light and a knock sensor with loom. The KnockLink is a self calibrating, visual knock warning tool. This kit is designed for tuning, street and race use. The G4 KnockLink is the only detonation warning device on the market that requires no setup. Other systems require time consuming gain, frequency and noise settings to be adjusted. Without proper knock listening tools, this can prove difficult if not