Perrin Firewall Grommet 2015-2021 WRX / 2015-2021 STI

Keep your engine bay clean and your wiring secure with the PERRIN Firewall Grommet. Designed to provide a clean and professional solution for routing wires, vacuum lines, or boost gauge tubing through the firewall, this grommet replaces the bulky and often leaky factory solution.

Crafted from high-quality rubber for superior durability and flexibility, the PERRIN Firewall Grommet ensures a tight seal to prevent engine bay fumes, water, or debris from entering the cabin. Its low-profile design makes it ideal for aftermarket installations, including electronic boost controllers, wideband O2 sensors, or sound system wiring.

Features:

• Seals firewall pass-through points cleanly

• Ideal for custom wiring or tubing installs

• Durable rubber construction resists heat and wear

• Simple installation – no cutting or permanent modifications required

Note: Can be used universally if a 1.25” to 1.4” hole can be drilled into the sheet metal

Installation Instructions