Swift Bump Spring - 2500 lb. Shifter Knob The two side mounts bolt

The two side mounts bolt on easily using the hardware supplied with your intercom and radio

but also want an adjustable blow-off sound like the Respons

has an effective lubrication range from -30 degrees F

Severe Duty Cutaway

Works with middle (F-Body type) belt spacing

Swift Bump Spring - 2500 lb. Shifter Knob The two side mounts boltSwift 2" O. D. bump springs offer the highest measurable shock stroke in the industry and, unlike inefficient rubber and foam bump stops, they are resistant to fatigue and heat. Swift Springs manufactures springs with differing rates for a variety of circle track racing applications. With options for both dirt and asphalt tracks, Swift has a wide range of coil spring formats, including coil over, dual rate, bump springs, and more. Swift Springs