Firewall Grommet 2-4 Gauge

The Firewall Grommet 2-4 Gauge by QUICKCAR Racing Products is an essential component for professional and amateur automotive builders routing electrical harnesses through the vehicle firewall. This grommet creates a clean, protected passage for battery cables, alternator wiring, and starter leads without damaging the metal or creating sharp edges that could compromise insulation. Whether you're building a custom hot rod, installing an upgraded electrical system, or performing a complete engine bay rewire, this firewall grommet eliminates the risk of wire chafing and maintains the integrity of your harness routing.

Designed to accommodate 2-4 gauge wire sizes, this grommet features a molded rubber construction that seals the firewall opening while allowing flexible routing of heavy-duty electrical conductors. The dual-gauge design means you can run multiple smaller cables or a single large-diameter conductor without binding or excessive friction. QUICKCAR Racing Products engineers this component to withstand under-hood heat cycles, engine vibration, and the occasional contact with coolant or oil without degrading—critical factors when reliability matters in motorsports or street applications. The compact 3.5 x 1.55 x 4.5-inch form factor fits most firewall opening sizes common to mid-size and full-size vehicles.

Builders installing custom battery systems, relocated fuel pumps, auxiliary fuses, or high-amperage circuits will find this grommet indispensable for professional-grade harness management. Installation is straightforward—position the grommet over the firewall hole, feed your 2-4 gauge cables through, and secure with hardware or adhesive. It's ideal for hot rod shops, race teams standardizing electrical installations, and serious DIY enthusiasts who refuse to compromise on the details. The lightweight design (0.08 lbs) adds no burden to your build while delivering measurable protection for your electrical system's longevity.