Energy Suspension Hyper-Flex Coil Spring Isolator - 3-3/4" ID - 5-7/16" OD - 1-1/8" Thick - Polyurethane - Black - Universal - (Pair) PD130K Heat-treated for guide plate compatibility

Heat-treated for guide plate compatibility then black oxide coated

2020-2020 GMC Sierra 3500 HD

1957-1980 Oldsmobile 98

Tapered Front

Energy Suspension Hyper-Flex Coil Spring Isolator - 3-3/4" ID - 5-7/16" OD - 1-1/8" Thick - Polyurethane - Black - Universal - (Pair) PD130K Heat-treated for guide plate compatibilityProduct Description: Coil Spring Isolator Hyper Flex 3 3 4 in ID 5 7 16 in OD 1 1 8 in Thick Polyurethane Black Universal Pair Energy Suspension is the world's leader in developing and manufacturing performance polyurethane automotive suspension products. Energy Suspension state of the art on site new product development program which carefully analyzes various vehicle reactions equipped with Energy Suspension Performance Polyurethane technology.