1976-1982 C3 Radiator Isolator Cushion Lower for 2.5 Inch Core 458356 - OEM Number(s) (458356)
Restore proper radiator alignment and stability on your 1976–1982 Corvette with this stock-style lower radiator isolator. Designed to fit factory or OE-style 2.5-inch thick heavy-duty radiators, this isolator eliminates movement that can lead to leaks, cracks, or premature wear. Whether you're refreshing your cooling system or completing a full restoration, this part ensures quiet, secure radiator operation and a correct OEM appearance.
Features
• Exact reproduction of GM #458356
• Fits 2.5" thick radiators (heavy-duty)
• Compatible with air-conditioned Corvettes
• Mounts to upper or lower radiator support bracket
• Sold individually – two required per Corvette
Because Details Matter
Correct radiator isolation isn’t just about protecting your cooling system—it’s about recreating the integrity and engineering precision of your C3. This rubber isolator is molded to factory shape and hardness, ensuring your restoration stays true to its origins.
Also known under these part numbers: (For reference only)
- 11628
- 33531
- 458355
- 458356
- 821641116284