SuperSprings SumoSprings Helper Spring Kit - Polyurethane - Blue Natural - 1400 lb - Trailer Axle (Pair) 7101BK Has externally accessible pressure relief

Has externally accessible pressure relief valve (max 14 PSI)

Some hammer form marks along the edge of the product can be expected

1983-1990 GMC S15

Nitrous Hard Line

Designed to work with 6-Pin GM Throttle body P/N's - 12570790

SuperSprings SumoSprings Helper Spring Kit - Polyurethane - Blue Natural - 1400 lb - Trailer Axle (Pair) 7101BK Has externally accessible pressure reliefProduct Description: Helper Spring Kit SumoSprings Hardware Included Polyurethane Blue Natural 1400 lb Trailer Axle Pair SuperSprings International manufactures high quality spring solutions to improve the handling, ride quality, and load capacity in a wide range of vehicles, including cars, trucks, SUVs, and even RVs. Whether they are used on daily drivers or on work trucks, Supersprings have a unique design that is designed for maximum reliability