Electrical Components

Electrical Components: the small parts that keep the current flowing

The electrical components in this category are the connectors, modules, switches and power-distribution parts that carry signal and current between the engine, the harness and the rest of the vehicle. When an injector pigtail corrodes, a flasher won't blink at the right rate after an LED swap, a regulator/rectifier cooks itself, or a bus bar can't handle the amperage you've added, these are the parts you replace. They're not glamorous, but a bad connection will strand you faster than a big-ticket failure will.

This is a category within our broader Engine Components section, and it covers a mix of truck, motorcycle and off-road hardware.

What ThreePiece stocks

There are 12 products on this page from 6 brands: Fleece Performance, Bike Master, Diode Dynamics, QuadBoss, TwinPower and Baja Designs. Fleece Performance is the deepest, with 7 of the 12 items, most of them Duramax injector connector pigtails. Prices currently run from $15 to $319 - that's the live range for what's in stock, not a fixed quote.

Concrete examples across that spread: the Fleece Performance 17-22 GM 2500/3500 Duramax injector connector 8-pack at the top end, its 4-pack counterpart, the Diode Dynamics SmartTap CF18 LED Flasher Module, a QuadBoss 150 Amp Bus Bar, the Baja Designs voltage regulator/rectifier for the Yamaha WR250F/WR450F, and the TwinPower chrome headlight switch for older Harley FL and XL models.

Fitment data is attached to 9 of the 12 products. Top makes are GM, Dodge, Ford, Harley-Davidson and Yamaha, with vehicles including the GM 2500/3500 and Duramax, Dodge 2500/3500, Ford F-250 through F-550, Harley FL and XL, and the Yamaha WR250F/WR450F, across model years spanning 1936 to 2022.

How to choose

Start with what failed and match the part to the job. For Duramax injector work, the pigtail pack count is the decision - buy the 8-pack if you're refreshing every cylinder, the 4-pack if you're only doing a bank or keeping spares. If you've fitted LED turn signals and the flasher rate is wrong, a module like the SmartTap fixes the resistance mismatch rather than adding resistors. A bus bar is about amperage headroom - size it to the load you've added, not the load you had. On motorcycles and off-road bikes, a regulator/rectifier is a direct-fit item, so confirm your make, model and year before ordering.

What else you need with it

Wiring work usually touches nearby systems. If you're chasing power supply, look at Batteries and Fuel Pumps. For plumbing and connection hardware, see Adapters and Fittings, and for cooling parts often serviced at the same time, Radiators.

Fitment help and ordering

Not sure a part matches your truck or bike? Call fitment help at 813-535-5801 before you buy. All orders ship with free shipping, and Affirm and Katapult financing is available. Questions on an order can go through contact us.

Electrical Components: the small parts that keep the current flowing

The electrical components in this category are the connectors, modules, switches and power-distribution parts that carry signal and current between the engine, the harness and the rest of the vehicle. When an injector pigtail corrodes, a flasher won't blink at the right rate after an LED swap, a regulator/rectifier cooks itself, or a bus bar can't handle the amperage you've added, these are the parts you replace. They're not glamorous, but a bad connection will strand you faster than a big-ticket failure will.

This is a category within our broader Engine Components section, and it covers a mix of truck, motorcycle and off-road hardware.

What ThreePiece stocks

There are 12 products on this page from 6 brands: Fleece Performance, Bike Master, Diode Dynamics, QuadBoss, TwinPower and Baja Designs. Fleece Performance is the deepest, with 7 of the 12 items, most of them Duramax injector connector pigtails. Prices currently run from $15 to $319 - that's the live range for what's in stock, not a fixed quote.

Concrete examples across that spread: the Fleece Performance 17-22 GM 2500/3500 Duramax injector connector 8-pack at the top end, its 4-pack counterpart, the Diode Dynamics SmartTap CF18 LED Flasher Module, a QuadBoss 150 Amp Bus Bar, the Baja Designs voltage regulator/rectifier for the Yamaha WR250F/WR450F, and the TwinPower chrome headlight switch for older Harley FL and XL models.

Fitment data is attached to 9 of the 12 products. Top makes are GM, Dodge, Ford, Harley-Davidson and Yamaha, with vehicles including the GM 2500/3500 and Duramax, Dodge 2500/3500, Ford F-250 through F-550, Harley FL and XL, and the Yamaha WR250F/WR450F, across model years spanning 1936 to 2022.

How to choose

Start with what failed and match the part to the job. For Duramax injector work, the pigtail pack count is the decision - buy the 8-pack if you're refreshing every cylinder, the 4-pack if you're only doing a bank or keeping spares. If you've fitted LED turn signals and the flasher rate is wrong, a module like the SmartTap fixes the resistance mismatch rather than adding resistors. A bus bar is about amperage headroom - size it to the load you've added, not the load you had. On motorcycles and off-road bikes, a regulator/rectifier is a direct-fit item, so confirm your make, model and year before ordering.

What else you need with it

Wiring work usually touches nearby systems. If you're chasing power supply, look at Batteries and Fuel Pumps. For plumbing and connection hardware, see Adapters and Fittings, and for cooling parts often serviced at the same time, Radiators.

Fitment help and ordering

Not sure a part matches your truck or bike? Call fitment help at 813-535-5801 before you buy. All orders ship with free shipping, and Affirm and Katapult financing is available. Questions on an order can go through contact us.