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

Restore factory-style fit and function on your 1968-1974 Corvette C3 with this firewall grommet. It is a great fit for full restorations, repairs and owners who simply want their car done right.

Product Highlights

• Tachometer Cable, Oil Line

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.

Vehicle Fitment

• 1968-1974 Chevrolet Corvette C3

Not sure this is the right part for your car? Contact us with your year and options before ordering and we'll help confirm fitment.