C3 1968-1974 Corvette Firewall Grommet - Tachometer Cable, Oil Line

The C3 1968-1974 Chevrolet Corvette Firewall Grommet is a purpose-built solution for routing the tachometer cable and oil line with precision through your Corvette’s firewall. Designed specifically for the C3 era, this grommet helps you preserve authentic routing while protecting vital lines from wear and unwanted movement.

Why this firewall grommet stands out

• Exact fit for 1968-1974 C3 Corvette firewall openings—engineered to align with factory dimensions so you can restore original look and function without guesswork.
• Dual-path compatibility—accommodates both the tachometer cable and the oil line as they pass through the firewall, reducing routing hassles during maintenance or restoration.
• Sealed, secure passage—provides a solid seal around each routed line, helping minimize air leaks and keeping the firewall area tidy and protected from abrasion.
• Simple, non-invasive replacement—designed for straightforward installation as a direct substitute for worn or missing grommets, without modifications to the firewall.

Ideal for

• Classic Corvette restorations and concours-quality upgrades for C3 models from 1968 through 1974.
• Owners who want to preserve authentic engine bay routing while ensuring reliable cable and line guidance.
• Mechanics and hobbyists performing routine maintenance where a clean, secure firewall pass-through is essential.

Installation & care tips

• Before installation, inspect the firewall opening and the existing cable and oil line positions to confirm proper alignment with the grommet’s routing paths.
• Place the grommet in the opening and press gently around the periphery until it seats snugly against the firewall surface.
• Route the tachometer cable and oil line through their designated paths, ensuring they are not kinked or under undue tension.
• Periodically inspect the grommet during maintenance intervals; replace if you notice cracking or compression that could compromise the seal.

Reclaim the authentic feel and reliability your C3 Corvette deserves with a dedicated firewall grommet that precisely accommodates the tachometer cable and oil line. A small part with a big impact on fit, protection, and long-term engine bay integrity.