There is absolutely no excuse for losing a race due to a poor wiring connection. MSD's Deutsch Connectors are sealed and lock together making them perfect for harsh racing applications. The compact housing of the connectors are molded from a durable plastic material that will not harden or crack. Each housing is indexed to prevent any chance of mismatching the ends plus they have a molded channel to secure another connector for a tidy appearance. The terminals grip to the wire with strong crimp tabs then lock into position inside the housing. The connections are protected with thick seals that will keep water, mud and debris away from the contacts. These terminals can handle more current than conventional connectors and do not require special tools. Supplied with terminals, seals and housings. Features: WaterproofHeat ShrinkableBattery Quick DisconnectsSpecial ToolsPerma-SealWeather PackDeutschQuick ConnectPit Stop USA offers MSD Deutsch 4-Pin Connector - 16 Gauge 8181 at low everyday prices. Be sure to check out all of our products from MSD including MSD Electrical Connectors.