FIREBIRD INDUSTRIAL By CHASSIS TECH. Product Questions call 1 800 842 8789.29 years at the same location. 40Amp Relay with Pre-Wired Socket. If we do not have it, we can build it. The item "B Wireless Air Helper Spring Kit chevy gmc 25/35HD 2001-2010 Compressor" is in sale since Friday, February 9, 2018. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Suspension & Steering\Other". The seller is "firebirdindustrial" and is located in Mesa, Arizona. This item can be shipped to United States.