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StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Discontinued
|

We apologize

This item has been discontinued

  • 4 Gauge Firewall Bushing
  • Water tight seal when power wires pass through metal
  • Locks securely as bushing is tightened
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Firewall Bushing Features

Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG

Warranty and Return Policy

Parts Warranty Duration
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.9
Features
4.7
Design
5.0
Usability
4.1

Kansas City, MO

Overall
Durability
Value
Features
Design
Usability
Best grommet out there

September 15, 2011

This is the best grommet I have ever worked with. Seals up and locks down so the wire can not be pulled either way. Cost reflects the build quailty and performance. I have used this not only in automotive applications but also in marine applications which says alot for the performance.

56 of 66 found this helpful

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Omaha, NE

Overall
Durability
Value
Features
Design
Usability
Good Product

October 21, 2011

This is great for going thru the firewall. Keeps the wire safe and secure from grounding out.

55 of 66 found this helpful

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Olive Branch, MS

Overall
Durability
Value
Features
Design
Usability
Great Product

September 8, 2009

This will allow you to go through the firewall without having to worry about grommets or the metal cutting the wire. Great Idea for a product!

56 of 69 found this helpful

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STAFFORD, VA

Overall
Durability
Value
Features
Design
Usability
GOOD PRODUCT

November 4, 2011

Worked like a charm could be alittle stronger plastic but still a good product.

50 of 60 found this helpful

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Hampton, VA

Overall
Durability
Value
Features
Design
Usability
Could be nice to use

July 22, 2012

I didn't use it. I bought my car used and the guy before me ran a system. I found the hole he used and it already had a rubber gasket type thing.

This could be very nice to have in some installation scenarios, like a complete rebuild.

Just know that you don't want your power wire chaffing on the firewall.

49 of 60 found this helpful

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Moyock, NC

Overall
Durability
Value
Features
Design
Usability
Outstanding Product

July 28, 2013

This feed through firewall bushing is a great product. I used it when I ran my power amp wiring through the firewall. Great protection, excellent size and very convenient. I definitely feel more comfortable knowing the wires are protected. I definitely recommend this to anyone routing a cable through a metal firewall.

46 of 57 found this helpful

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Saint Louis, MO

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
StreetWires FB4

April 2, 2017

Nice design to guide and waterproof the wire through the firewall. Tighten snug, not necessary to over tighten to waterproof. May need a helper.

0 of 0 found this helpful

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Product Summary

Manufacturer

Model Number

FB4

Weight

0.25lbs

Internal SKU

fb4

Internal Product ID

15905

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: StreetWires FB4