Radiator Cushion Molded GM Channel

The Radiator Cushion Molded GM Channel from DeWitts Radiator is a precision-engineered rubber bushing designed to isolate and stabilize radiator mounting in classic GM vehicles from 1966 through 1982. This component serves a critical function in older American muscle cars and street machines: it absorbs vibration transferred from the engine block to the radiator core, preventing coolant line stress fractures and extending radiator lifespan. For restoration enthusiasts and performance builders working on first-generation Camaros, Chevelles, and full-size Chevrolets, proper radiator isolation is essential to protecting cooling system integrity under sustained use.

Constructed from durable molded rubber compounded to withstand engine bay temperatures and automotive fluids, this cushion features a precision-molded channel geometry that seats into the radiator's mounting flange without modification. The black rubber formulation resists degradation from coolant splash, oil mist, and ultraviolet exposure—a critical consideration in engine bays where older cooling systems operate at elevated temperatures. The compact 3.1 x 1.1 x 4.6-inch profile integrates seamlessly into factory mounting points, and its 0.11-pound weight adds negligible mass while providing substantial vibration damping across the RPM band.

Restorers and engine builders standardly install this radiator cushion as part of a complete cooling system refresh, whether pursuing show-quality authenticity or reliable street operation. Replacement is straightforward—simply position the molded channel at the radiator mounting point and secure via existing hardware, requiring no special tools or modifications. Sold individually per unit, this cushion pairs with DeWitts' full radiator lineup and compatible with stock or performance cooling configurations across the classic GM platform.