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Engine and 6L80E Transmission Wiring Harness Fits Select GM Gen V LT L83/L86 Engines
InfoVehicle Info Needed
TOP STREET PERFORMANCEPART NUMBER: 743-WH1221

Engine and 6L80E Transmission Wiring Harness Fits Select GM Gen V LT L83/L86 Engines

$54000$600.00You Save$60.00
ShippingShips on 11/03/2026
Lowest PriceLowest Price Guarantee

LT Engine and Transmission Wiring Harness
  • Fits Select GM Gen V LT L83/L86 Engines
  • 6L80E Transmission Wiring
  • Fuse and Relay Box Included
  • Sold as a Kit

    This standalone harness wires a GM Gen V LT L83 or L86 engine with a 6l80e transmission for swap projects. It includes a fuse and relay box so the engine can run independently of the vehicle wiring.

    Top Street Performance WH1221 Engine and Transmission Wiring Harness Features:

    • Fits select GM Gen V LT L83/L86 engines
    • 6L80E transmission wiring
    • Fuse and relay box included
    • Part TypeEngine Wiring Harness
    BrandTOP STREET PERFORMANCE
    Package Height6.0
    Package Width14.0
    Package Length24.0
    Weight9.0 PG
    Part CategoryPerformance Parts
    Fuse BlockIncluded
    IncludedFuse/Relay Box
    QuantitySold as a Kit
    Harness LengthStandard
    Part FitmentSemi Universal
    ThrottleDrive-by-Wire
    Vendor Part NumberWH1221
    Package Qty1
    Package TypeEA

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