4 Gauge (4 AWG) Nylon Firewall Grommet Bushing

Description

4 Gauge (4 AWG) Waterproof Firewall Grommet & Bushing

Get a secure, waterproof, and airtight seal for your vehicle’s wiring. Designed to perfectly fit 4 Gauge (4 AWG) wire and cable, this premium premium nylon firewall grommet is the ultimate solution for protecting your lines from sharp sheet metal edges.

The Perfect Thru-Firewall Cable Protection

After years of amplifier and stereo installs, it’s clear that conventional plastic snap grommets are fragile and often break. Over time, heat exposure makes them brittle, leaving your expensive amplifier power cable chafing against sharp firewall edges. Standard rubber grommets aren’t much better—they often lead to annoying hissing air leaks, let in water during pressure washing, and easily pull out if the cable is nudged.

This grommet solves those problems. It provides a perfect, bulletproof seal against your cable, ensuring:

• No air leaks into the cab of your vehicle.
• No water intrusion from the engine compartment.
• A secure hold that won’t pull out of the firewall.
• A super clean, professional look under the hood.

Versatile Applications

While perfect for heavy-duty power cables, this grommet is highly versatile. It can be used to run speaker zip wire, route multiple wires through a single hole, or aesthetically wire boxes and enclosures. It also pairs perfectly with split wire looms to create a clean, “stock” look.

Easy Installation

1. Drill a 7/8″ (23mm) hole using a hole saw or drill.
2. Insert the firewall grommet through the hole and secure it with the firewall nut.
3. Slide your wire through the center.
4. Tighten the compression nut to create a perfect, watertight seal.

Technical Specifications