Swift Rear Coil Spring - 5.0" OD x 20" Tall - 150 lb. HS11SASM61 With today's high rpm

With today's high rpm

Shift on the fly

1957-1957 Nash Rambler

5" springs on shocks

Swift Rear Coil Spring - 5.0" OD x 20" Tall - 150 lb. HS11SASM61 With today's high rpmDEVELOPED SPECIFICALLY FOR ROUND TRACK RACING. DESIGNED TO HAVE THE OPTIMAL SPRING RATE SWEET SPOT WHERE THE SPRING IS USED ON ACTUAL VEHICLE. 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 superior engineering has provided the