Haltech Firewall Rubber Wiring Grommet — 51mm OD 21mm ID

SKU: HALHT-039003

About Haltech Haltech engineers high-quality automotive parts and accessories trusted ...Read more

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Haltech

Haltech engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Haltech lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Protect Your Wiring Harness

The Haltech Firewall Rubber Wiring Grommet (51mm OD / 21mm ID) is a must-have for any custom wiring project. When you are running a standalone engine harness through the firewall, the metal edges of the chassis can easily cut through wire insulation, leading to short circuits and system failures. This premium rubber grommet creates a protective barrier, ensuring your wiring remains intact and secure regardless of the driving conditions.

Benefits of Quality Grommets

  • High-grade rubber compound for durability
  • 51mm (2in) OD fits standard firewall cutouts
  • 21mm (13/16in) ID accommodates various harness sizes
  • Provides a clean, finished look to your engine bay
  • Weather-resistant seal protects the cabin from engine bay elements

Proper cable management is what separates a amateur build from a professional one. By using the correct firewall grommets, you ensure that your harness is not only protected from mechanical damage but also properly routed to avoid interference with other vehicle components. This grommet is designed for longevity, resisting the effects of extreme temperatures and vibrations found in high-performance automotive applications. For all your wiring and fabrication needs, look to GGCRACING to provide the quality components required for a reliable build.

About Haltech

Haltech engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Haltech lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Protect Your Wiring Harness

The Haltech Firewall Rubber Wiring Grommet (51mm OD / 21mm ID) is a must-have for any custom wiring project. When you are running a standalone engine harness through the firewall, the metal edges of the chassis can easily cut through wire insulation, leading to short circuits and system failures. This premium rubber grommet creates a protective barrier, ensuring your wiring remains intact and secure regardless of the driving conditions.

Benefits of Quality Grommets

  • High-grade rubber compound for durability
  • 51mm (2in) OD fits standard firewall cutouts
  • 21mm (13/16in) ID accommodates various harness sizes
  • Provides a clean, finished look to your engine bay
  • Weather-resistant seal protects the cabin from engine bay elements

Proper cable management is what separates a amateur build from a professional one. By using the correct firewall grommets, you ensure that your harness is not only protected from mechanical damage but also properly routed to avoid interference with other vehicle components. This grommet is designed for longevity, resisting the effects of extreme temperatures and vibrations found in high-performance automotive applications. For all your wiring and fabrication needs, look to GGCRACING to provide the quality components required for a reliable build.

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