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4-Feet Extension Harness for Transmission Control Module to Handheld

Extension harness from your TCM to Handheld, 4 Feet Length

Part # 27621 Be the first to write a review
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In case the harness that comes with the TCM Handheld is not long enough, the 4 Feet Extension Harness should give you the necessary slack to extend and mount the handheld in the desired location on your dashboard.


  • 4 Feet in length
  • Firm lock in tab to ensure connection

About Atomic

MSD’s Atomic EFI systems were designed with two goals; to simplify EFI and improve overall performance. Component integration resulted in easier installation and programming while advanced self-learning properties maximize your engine's output.

Brand Atomic
Emission Code5
Length4 feet
Product TypeTrans Controller Harness
WarrantyLimited 1 Year Warranty
Part Number27621

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Limited 1 Year Warranty: See Details

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    Some parts are not legal for use in California or other states with similar regulations.

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