Swift Coil-Over Spring - Bulletproof - Barrel Type - 2.5" ID x 14" Tall - 150 lb. Samco Sport 4340 FORGED STANDARD WEIGHT crankshaft

4340 FORGED STANDARD WEIGHT crankshaft features straight shot oil holes - Nitride hardened for superior wear resistance - Lightening holes in all rod throws - Precision ground and micropolished - 4130 forged material

All cap assemblies feature one way check valve vent

Finish - Black Oxide

1986-1995 Ford E-150 Econoline

1970-1977 Chevrolet El Camino

Swift Coil-Over Spring - Bulletproof - Barrel Type - 2.5" ID x 14" Tall - 150 lb. Samco Sport 4340 FORGED STANDARD WEIGHT crankshaftPURPOSE BUILT FOR THOSE OF YOU PUTTING MORE STRESS ON A SPRING THAN HOW IS CONVENTIONALLY USED. WE SOUGHT AFTER A NEW APPROACH IN DEVELOPMENT FROM OUR REGULAR SUSPENSION SPRING. 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