Product Description: BMW M2/M3/M4 Stage 4 Fuel System Upgrade for the S55 Motor

This product offers a port injection kit and LPFP upgrade for the S55 motor. The port injection kit provides additional fueling capacity for running up to 100% E85 on stock or upgraded turbos, without requiring permanent modification. The Stage 4 LPFP upgrade is a dual pump system necessary for making over 600whp on E85.

Included in the Stage 4 Kit:

• Port Injection kit
• Fuel-It! custom black anodized spacer and fuel rail
• Bosch injectors, BMW OEM gaskets
• Stage 4 LPFP Upgrade with Flex Fuel pump and Walbro 450 pump
• Dual -6an E85 compatible feed lines, fuel filter, return kit, and regulator
• Optional 950cc injector upgrade, Ethanol Sensor, and Bluetooth Analyzer

Recommended Accessories:

• F-series lockring removal tool
• Hobb’s switch

Applications:

• BMW M2 Competition (2018-2021)
• F80 M3 including Competition (2015-2020)
• F82 F83 M4, M4 GTS, M4 CS including Competition (2015-2020)

Install guides and diagrams are available for ease of setup. Please note that these kits are for off-road use only and allow 5-7 business days for shipping due to being built to order. Ethanol sensors may provide artificially elevated readings in the presence of fuel contamination.