Edelbrock Custom Direct Port Plumb Kit #71853 is designed for use on modified V-8 engines. This is one of our most sophisticated nitrous systems allow you to tune each individual cylinder for superior performance! Includes our Victor Pro Nitrous Solenoids, stainless steel lines, stainless steel jets and most hardware to complete the installation. This kit utilizes our E3 nozzles for serious competition with power increases of up to 300 horsepower or more. For racers with an existing system, our manifold Plumb Kits include everything to plumb a manifold only (no wiring harness, relays, or thread tap).