Swift Bump Spring - 700 lb. SPBM1 see part 52612-S550

see part 52612-S550

This exhaust uses all factory hanger locations

These Pulleys are made to use a 1

2 moment of inertial - 51% of the moment of inertia of an equivalent typical OEM flexplate

Swift Bump Spring - 700 lb. SPBM1 see part 52612-S550Swift 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