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Precision Raceworks F-Series B58 Auxiliary Fuel System
for BMW F22/F23/F3x B58 Turbo 2016-2020
- AFS.425 -(Walbro450) · $1,999.99
- AFS.450 - (Walbro525) · $2,099.99
- AFS.460 - (Walbro535) · $2,099.99
Call to order: (405) 906-3935
Want it installed? Book it at SPEEDhaus, Edmond OK Not sure it fits? Ask usFits (per Precision Raceworks, checked by our tech team): BMW M240i (F22/F23, B58) 2017-2020; BMW 340i (F30, B58) 2016-2018; BMW 440i (F32/F33/F36, B58) 2017-2019
From Precision Raceworks: The Precision Raceworks F-Series (F3x/F2x) B58 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 on modern BMW's, 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 #: 601-0394, 601-0397, 601-0398
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.