Adjustable Manual Boost Controller, made with Aluminum and Stainless Steel to ensure a long life in the harsh underhood enviroment.
From the included Instructions:"Before you install your HBC you must already have a performance Exhaust System, a low restriction Air Filter, and an Aftermarket Boost Gauge. An Aftermarket Boost Gauge is a must because most stock gauges will not read correctly at higher than stock boost levels."
Comes with 3 feet (1 meter) of black silicone hose and installation instructions.