This product has been discontinued. You may be interested in the Precision Raceworks BMW S55 F80 F82 F83 F87 High Performance Fuel Pump for M2 Competition, M3 and M4 as an alternative.
Fuel-It BMW S55 Stage 4 Fuel System Upgrade for 600+ whp — M2 Competition, M3 and M4
Looking for a BMW S55 fuel pump upgrade that supports high horsepower and reliable E85 fueling on the M2 Competition, M3 and M4? The Fuel-It Stage 4 Fuel System combines a complete S55 port injection kit with a dual-pump E85 compatible LPFP upgrade to deliver the extra fuel volume your build needs. Ideal for 100% E85 on stock or upgraded turbos, this package is engineered for serious power while maintaining OE-like drivability.
At Nforcd we have supplied and installed this system on S55 builds in-house, and our customers have been delighted with the stable fuel pressure, smooth idle and consistent high-boost performance. If you are pushing beyond the limits of the factory fuel system, this BMW S55 fuel system upgrade is the proven route to 600+ wheel horsepower and dependable ethanol fueling.
Why choose this S55 fuel system upgrade
- Supports 600+ whp on E85 with stock or hybrid turbos
- Run higher ethanol content with confidence — up to 100% E85 capability
- Dual pump LPFP doubles factory low pressure fuel capacity for stable pressure under boost
- Port injection adds the extra fuelling DI alone cannot supply at high power
- E85 compatible components, lines and filter for reliable flex fuel operation
- No permanent modification required to the intake manifold area
What is port injection on the S55
Port injection installs between the S55 intake manifold and cylinder head and feeds additional fuel from the low pressure supply. It supplements the direct injection system to provide the extra fuel volume required for high ethanol content and big power. The design is straightforward to install and does not require permanent changes to the vehicle.
What is the Stage 4 LPFP upgrade
The Stage 4 low pressure fuel pump upgrade is a dual pump, E85 compatible assembly that effectively doubles factory LPFP capacity. It is the recommended solution when targeting more than 600 whp on ethanol blends.
What’s included
-
Port Injection Kit
- Fuel-It custom black anodised spacer for the intake manifold
- Fuel-It custom black anodised fuel rail
- Black anodised aluminium and stainless steel hardware
- Six flow matched Bosch injectors 750 cc
- Six BMW OEM gaskets
-
Stage 4 LPFP Upgrade
- OEM flex fuel pump
- Secondary pump Walbro 450
- Dual -6 AN E85 compatible feed lines
- Dual input E85 compatible fuel filter
-
Return Kit
- Fuel pressure regulator 1:1 boost referenced
- Return line
- Silicone boost reference line and fittings
Optional upgrades
- 950 cc injector upgrade
- Ethanol Sensor and Bluetooth Analyzer upgrade
- Continental ethanol content sensor
- 3/8 inch Cam-Lock style fittings
- Bluetooth Analyzer for iPhone or Android apps purchased separately
Colour note: We supply the kit with black intake couplers as standard. If you require red or blue, email us after ordering with your order number and preferred colour.
Compatibility
This Fuel-It Stage 4 fuel system upgrade fits BMW models with the S55 engine:
- F80 M3 2012 to 2015 and LCI 2015 onwards
- F82 M4 2013 onwards including LCI
- F83 M4 Convertible 2013 onwards including LCI
- F87 M2 Competition 2019 onwards
Engine code: S55
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Fitting and installation
Professional fitting is recommended for all fuel system upgrades. Nforcd offers installation in Warwickshire. Request a fitting quote by emailing Sales@nforcd.com.
Port Injection Controller install guides are available from the manufacturer here: https://www.fuel-it.com/port-injection-controller/
Compatibility check before dispatch
To ensure the part fits your vehicle, we run a compatibility check prior to dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout.
Part number
FI042
Important notes
- For off-road use only
- Ethanol sensors infer ethanol content by the absence of petrol. If fuel is contaminated, readings may be artificially elevated
Manufacturer
Fuel-It