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2018-21 Mustang BBK O2 Extensions 5.0 by BBK Mustang Parts

Details   |  Description   |  Reviews
BBK Mustang O2 Extensions (18-19) 5.0 1121
BBK Mustang O2 Extensions (18-19) 5.0 1121
BBK Mustang O2 Extensions (18-19) 5.0 1121
BBK Mustang O2 Extensions (18-21) 5.0 1121
  • BBK Mustang O2 Extensions (18-21) 5.0 1121
  • BBK Mustang O2 Extensions (18-21) 5.0 1121
  • BBK Mustang O2 Extensions (18-21) 5.0 1121

Complete your Mustang GT long tube header install with BBK's 2018-2021 Mustang GT O2 extensions!

Item #BBK-1121
MPN# 1121

Everyday Low Price: $59.99

Availability: In Stock [ ? ]

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  • Plug & Play Connections
  • Required w/ Longtube Headers
  • Made In USA


  • 6 Pin Connections
  • Heat Protective Sleeves
  • OEM Style Connectors

What's in the Box

  • (2) O2 Extensions
Made in the USA

Product Description

2018-2021 Mustang O2 Extensions
When doing a long tube header installation on any Mustang, chances are you'll need to extend the oxygen sensor harnesses. BBK takes out the guesswork with this 2018-2021 Mustang GT O2 extension kit! The factory harness cannot reach the new O2 sensor location, therefore these extension harnesses are needed. BBK utilizes factory style, 6-pin connectors to ensure a perfect fit. These Mustang O2 extensions control the upstream oxygen sensors.

Installation Note
Some connectors may require the small directional location tabs to be removed from the ends of the connectors to click into place.

- Fits 2018-2021 Mustang GT

BBK Warranty - Click Here

California Residents:
Prop 65 Warning SignWARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

Vehicle Applications

Ford Mustang - 2018 (18) - 2019 (19) - 2020 (20) - 2021 (21)

About This Brand

BBK Mustang Parts
BBK Mustang Parts - Today's Performance
Since 1988 - BBK has dedicated itself to designing and building cutting-edge high-performance parts and accessories for today's EFI-equipped Mustangs and Ford Lightnings while maintaining the OEM quality levels.

From their world-famous line of "Power-Plus-Series" performance throttle bodies to their hundreds of "CNC-Series" performance exhaust offerings - the BBK brand is known for delivering unmatched value and quality. Shop BBK for your Mustang headers, exhaust, cold air intakes, and other performance parts!

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