Fuel System

Fuel System: Get Enough Fuel to the Engine, Reliably

The fuel system is the chain that moves fuel from the tank to the injectors at the pressure and volume the engine needs. When you add power - bigger injectors, more boost, a diesel tune, nitrous - the factory pumps, lines and regulators often run out of headroom, the engine leans out under load, and you lose the power you paid for. The parts in this category rebuild or upgrade that chain: lift pumps, high-pressure pumps, surge tanks, fuel hats, air-separation systems, return kits and regulators that keep supply ahead of demand.

What ThreePiece stocks

This category currently holds 55 products from 15 brands, priced from $33 to $2,017 - that range reflects what is in stock now, not a standing offer. Radium Engineering is the deepest line here with 18 products, followed by Fleece Performance (7), plus AirDog and All Balls Racing at 6 each, and single or paired listings from Aeromotive, AEM, Fuelab, Snow Performance, Sinister Diesel, Torque Solution, TwinPower, Bikers Choice, QuadBoss, DDP and Nitrous Express.

Coverage spans diesel trucks, sport compact, V8 and powersports. Of the parts with listed fitment (30 of the 55), the top makes include Ford, Dodge, Acura, Nissan, Chevrolet, Honda, BMW, Harley Davidson, Polaris, Yamaha and Kawasaki, over model years from 1936 to 2024. Concrete examples: the Fleece Performance PowerFlo 750 for the 07.5-12 Dodge 6.7L Cummins, the PureFlow AirDog II-5G for the 94-98 12V Cummins, the Sinister Diesel Regulated Fuel Return Kit for the 99-03 Ford 7.3L, and the Snow Performance dual-pump fuel hat for the 03-13 Corvette.

How to choose

Match the part to your platform and your goal. On diesel trucks, a lift pump or air-separation system like the AirDog feeds a healthy high-pressure pump and protects it from air and debris; a Fleece CP3 upgrade addresses the high-pressure side for bigger power. On boosted gas builds, a surge tank keeps the pumps fed under hard cornering - see the multi-pump Radium FCST-X three-pump surge tank against the single-pump FCST-X if you don't yet need the flow. The honest trade-off is capacity versus cost and complexity: buy pump count and flow for the power you're actually running, not the number on a dyno sheet you're chasing.

What else you need

Plumbing a fuel system means Fittings and Adapters to tie the new hardware into your lines. If you're sourcing a pump on its own, the dedicated Fuel Pumps category has 372 listings. While the engine is apart, check Gasket Kits and Oil Filters. Browse the full Engine Components section for the rest of the build.

Fitment and ordering

Confirm the part fits your year, make and model before you buy - fitment help is available by phone at 813-535-5801, or reach us through contact us. All orders ship free, and Affirm and Katapult financing is available on qualifying purchases.

Fuel System: Get Enough Fuel to the Engine, Reliably

The fuel system is the chain that moves fuel from the tank to the injectors at the pressure and volume the engine needs. When you add power - bigger injectors, more boost, a diesel tune, nitrous - the factory pumps, lines and regulators often run out of headroom, the engine leans out under load, and you lose the power you paid for. The parts in this category rebuild or upgrade that chain: lift pumps, high-pressure pumps, surge tanks, fuel hats, air-separation systems, return kits and regulators that keep supply ahead of demand.

What ThreePiece stocks

This category currently holds 55 products from 15 brands, priced from $33 to $2,017 - that range reflects what is in stock now, not a standing offer. Radium Engineering is the deepest line here with 18 products, followed by Fleece Performance (7), plus AirDog and All Balls Racing at 6 each, and single or paired listings from Aeromotive, AEM, Fuelab, Snow Performance, Sinister Diesel, Torque Solution, TwinPower, Bikers Choice, QuadBoss, DDP and Nitrous Express.

Coverage spans diesel trucks, sport compact, V8 and powersports. Of the parts with listed fitment (30 of the 55), the top makes include Ford, Dodge, Acura, Nissan, Chevrolet, Honda, BMW, Harley Davidson, Polaris, Yamaha and Kawasaki, over model years from 1936 to 2024. Concrete examples: the Fleece Performance PowerFlo 750 for the 07.5-12 Dodge 6.7L Cummins, the PureFlow AirDog II-5G for the 94-98 12V Cummins, the Sinister Diesel Regulated Fuel Return Kit for the 99-03 Ford 7.3L, and the Snow Performance dual-pump fuel hat for the 03-13 Corvette.

How to choose

Match the part to your platform and your goal. On diesel trucks, a lift pump or air-separation system like the AirDog feeds a healthy high-pressure pump and protects it from air and debris; a Fleece CP3 upgrade addresses the high-pressure side for bigger power. On boosted gas builds, a surge tank keeps the pumps fed under hard cornering - see the multi-pump Radium FCST-X three-pump surge tank against the single-pump FCST-X if you don't yet need the flow. The honest trade-off is capacity versus cost and complexity: buy pump count and flow for the power you're actually running, not the number on a dyno sheet you're chasing.

What else you need

Plumbing a fuel system means Fittings and Adapters to tie the new hardware into your lines. If you're sourcing a pump on its own, the dedicated Fuel Pumps category has 372 listings. While the engine is apart, check Gasket Kits and Oil Filters. Browse the full Engine Components section for the rest of the build.

Fitment and ordering

Confirm the part fits your year, make and model before you buy - fitment help is available by phone at 813-535-5801, or reach us through contact us. All orders ship free, and Affirm and Katapult financing is available on qualifying purchases.