Firewall Rubber Wiring Grommet Diameter: 51mm (2″) OD 21mm (13/16″) ID

Haltech Firewall Grommet (2″ OD / 13/16″ ID): Precision Harness Protection

For medium-sized wiring bundles or auxiliary harnesses, the Haltech 2″ Firewall Grommet provides professional-grade isolation. Designed to fit a standard 51mm (2″) hole, this grommet features a smaller 21mm (13/16″) inner aperture, making it ideal for tighter bundles like transmission sub-harnesses, battery cables, or fluid lines. The thick rubber construction ensures a hermetic seal against the firewall, preventing water ingress and chafing.

Engineering Application

Using the correct size grommet is vital. If the ID is too large for the wire bundle, fumes and noise leak into the cabin. This specific size is engineered for harnesses where a snug fit is required around a ~20mm bundle, providing strain relief and preventing the wires from moving back and forth through the bulkhead.

Fitment Guide

• Hole Size: Requires a 51mm (2″) hole.
• Harness Size: Suits bundles approx. 21mm (13/16″).

Technical Specifications

Summary & What’s Included

Includes:

• 1 x 2″ Firewall Grommet (Small ID)