Precision Raceworks Stand Alone AFS

Fits (per Precision Raceworks, checked by our tech team): BMW M340i (G20, B58) 2019-2023; BMW M440i (G22/G23/G26, B58) 2020-2023

From Precision Raceworks: NOW FEATURING PLUG AND PLAY CONNECTORS and AN8 Adapters for your fuel rail! Now it is no longer necessary to cut your factory harness!. The Precision Raceworks M3/M4/M340i/M440i (G8x/G2x) Stand Alone AFS ™ is the highest performing and most stable low pressure fuel system on the market!

Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection! Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up.

Historically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.

Additionally, the high pressure pump control system dumps fuel back into the low pressure system at high pressure low volume resulting in oscillations of the low pressure fuel system. Because of this the DI system in the car is required to constantly make corrections to keep target AFR in check.

Brand: Precision Raceworks
Part #: 601-0281, 601-0282, 601-0283, 601-0284, 601-0285

Shipping calculated at checkout.

This part can't ship to California (CARB).

Not sure it fits? Call the shop with your VIN: (405) 906-3935.