C3 1968-1982 Corvette Vacuum Hose Firewall Grommet - 3-Hole

Restore the integrity of your C3 Corvette with precision—the C3 196-1982 Chevrolet Corvette Vacuum Hose Firewall Grommet, 3 Hole. This dedicated firewall pas-through is built for the classic 1968–1982 Corvette layout, delivering a clean, secure route for multiple vacuum lines where they meet the engine bay and cabin.

Engineered for C3 Corvette (196-1982)

Designed to fit the distinctive thre-hole firewall opening used on the C3 generation, this grommet provides a tight seal around vacuum hoses while accommodating three separate hose entries. It’s a targeted solution for owners restoring or maintaining a perio-correct engine bay.

Why this -Hole Grommet matters

• Prevents vacuum leaks that can affect brake boost, PCV system, and overall engine performance by maintaining a stable hose seal through the firewall.
• Organizes multiple vacuum lines with a single, integrated grommet, reducing wear from movement and minimizing routing confusion during maintenance.
• Protects hoses from firewall edges and heat exposure, extending hose life and reducing the risk of cracks or abrasion.
• Maintains a cleaner engine bay appearance with a neat, factor-like pas-through that respects the Corvette’s classic lines.

What you get

A purpos-built -hole firewall grommet designed for C3 Corvettes, ready to install where three vacuum lines pass through the firewall. It provides a durable, reliable seal that helps keep your vacuum systems operating as intended.

Installation tips

• Remove old grommet and inspect the firewall edge for cracks or damage; replace if necessary to ensure a proper seal.
• Clean the firewall surface before installing the new grommet to maximize seal integrity.
• Route the vacuum hoses through the designated holes, ensuring hoses aren’t twisted or kinked, and verify that all connections are snug.
• Recheck fit after engine bay reassembly and test vacuu-operated components to confirm there are no leaks.

Ideal for

Classic Corvette enthusiasts, hobbyists, and restorers working on the C3 generation (1968–1982). Whether you’re replacing a deteriorated grommet during a restoration or simply r-routing vacuum lines for better reliability, this -hole grommet is a practical, targeted upgrade.

Better than generic alternatives

Framed specifically for the C3 firewall pattern and thre-port vacuum routing, this grommet offers a precise fit that generic, mult-application grommets can’t guarantee. Expect a tighter seal, cleaner line management, and fewer adjustments after installation.

Care and longevity

Regularly inspect the grommet for signs of cracking or hardening, especially after exposure to heat cycles. A fresh, pliable grommet maintains effective sealing and hose protection for years of Corvette cruising.