3400,
Showing 10–18 of 20 results
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LMMF 96-2005 3100/3400 ECM Harness Combo
$525.00 Complete plug-and-play wiring solution for your 3100/3400 includes ECM and HarnessADD TO CART -
LMMF 96-97 3100 Simplified harness
$320.0096-97 3100 Simplified Standalone Wiring Harness
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LMMF 96-97 3100 Tuned Ecm
$120.00Custom ECM Tune for 1996–1997 GM 3100 Engines
Unlock the full potential of your 1996–1997 GM 3100 engine with a custom ECM tune designed specifically for race, off-road, and demolition derby applications. This calibration removes factory limitations while optimizing performance and reliability for stripped-down builds.
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LMMF 96-99 3100 injector Harness
$105.00 The 96–99 3100 injector harness is a direct factory-style replacement for 1996–1999 GM 3100 engines, built to provide a clean and reliable solution for stock replacements or simplified engine setups.ADD TO CART -
LMMF 96-99 to 00+ Injector adapter pigtail
$75.0098–00+ Injector Adapter Pigtail
Easily convert your 1996–1999 GM 3100 or 3400 wiring harness to work with a 2000–2005 style injector harness using this 98–00+ Injector Adapter Pigtail.
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LMMF 98-99 3100/3400 Simplfiied wiring harness
$315.00 Our LMMF Simplified Standalone Harness is built to make getting your engine running quick, clean, and reliable. Designed with all new wiring and connectors, this harness eliminates unnecessary factory wiring and provides a simple solution for swaps, derby cars, race builds, and off-road applications.ADD TO CART -
LMMF 98+ 3100/3400 Tuned ECM
$140.00 This Custom ECM Derby Tune for 1998–2005 GM 3100 / 3400 engines is built specifically for demolition derby and off-road applications where factory limitations just get in the way.ADD TO CART -
LMMF Adjustable Wbody Throttle Bracket
$55.00 LMMF Adjustable Throttle Bracket – GM 3100 / 3400 / 3500 (6-Bolt & 12-Bolt Options) Fix throttle cable alignment the right way with the LMMF Adjustable Throttle Bracket, built specifically for GM 3100, 3400, and 3500 LX9 engines. Designed for engine swaps, demolition derby builds, and custom setups, this bracket eliminates the common throttle geometry problems that come from factory parts or homemade solutions.Select options -
LMMF Quick Disconnect switch box
$240.00 The LMMF Quick Disconnect Switch Box gives you a clean, simple way to control your car while making it incredibly easy to remove or swap components between builds.ADD TO CART