850cc Port Fuel Injectors for BMW 2021-2024 M4/M3 G8X S58 (Set of 6)

$625.00
In stock
SKU
5850

Proudly Accepting

major-credit-card-logos-png-5_1

Unlock the full potential of your S58 engine with these 850cc port fuel injectors, engineered for the 2021-2024 BMW M3 (G80), M4 (G82/G83), and M2 (G87). These high-impedance injectors provide the supplemental fueling needed for high-horsepower builds running E85 or high-boost setups. Designed to integrate with aftermarket port injection rails and manifolds, they deliver superior atomization and the flow consistency required for 800+ whp goals.

Supplemental Fueling for the Ultimate BMW Performance Platform

The S58 engine is a powerhouse, but the factory direct injection system often hits its limit when pushing for high-ethanol blends or larger turbos. Our 850cc port injectors provide the necessary fuel volume to alleviate DI stress and allow for safer, richer air/fuel mixtures at high boost levels.

Key Technical Features:

  • Vehicle Fitment: Direct fit for G80 M3, G82/G83 M4, and G87 M2 (2021–2024+). Also compatible with F97 X3M and F98 X4M.

  • Fuel Compatibility: Full E85 and Ethanol compatibility with stainless alloy internals to prevent corrosion.

  • Precision Flow Matching: Each set of 6 is matched within 1% to ensure perfect cylinder-to-cylinder fuel distribution, crucial for high-load S58 applications.

  • Advanced Bosch Technology: Built on the reliable Bosch EV14 platform, offering excellent low-pulse-width linearity and a smooth idle.

  • Fitment Note: These injectors are designed for use with port injection kits (such as Fuel-It!, Precision Raceworks, or aftermarket intake manifolds).

Installation Note: Use of an external port injection controller (such as ReFlex, Motiv, or JB4) and custom tuning (MHD, BM3, or EcuTek) is required to manage the supplemental fuel delivery.

Copyright © 2026 SouthBay Fuel Injectors, Inc. All rights reserved.