The MPI System is the hardware half of APR's Stage 3+ ecosystem, required alongside matching APR ECU/TCU software to unlock true Stage 3+ output. If you're already running APR Stage 3 software and looking to add the fueling capacity to go further, or building a custom Stage 3+ setup piece by piece, this is the component that makes it possible. Compatible across the EA888 Gen 3 (Audi 8V/8Y A3, S3, TT, TTS, Q3; VW Mk7/Mk7.5 Golf R, GTI, Arteon, Jetta) and EA888 Gen 4 (2022+ Mk8 Golf R, Audi S3) platforms.. Real Stage 3+ power lives or dies on fuel delivery, and the APR Multi-Port Injection (MPI) System is the difference between a turbo that flows and an engine that starves. Built around four Bosch Motorsport EV14 980cc/min injectors, this system supplements the factory direct-injection fuel system with high-flow port injection, delivering the fuel volume needed to safely support Stage 3+ boost, E85, and M100 calibrations that the stock fuel system simply can't keep up with.. Every component is engineered to bolt in clean: an APR-matched Bosch Jetronic-to-OEM harness, OEM-style fuel rail and rail sensor, APR fuel distribution block, and all mounting hardware are included, so the system installs onto the factory intake manifold without any custom fabrication.. Please Note: This system requires matching APR Stage 3+ ECU/TCU software and is designed for use only in conjunction with a compatible APR turbocharger system upgrade. It is not a standalone fueling solution and will not function correctly without the required software calibration.. Bosch Motorsport 980cc MPI injectors, fuel rail, harness & distribution block. Fits Audi A3/S3/TT/TTS/Q3, VW Golf R/GTI/Arteon/Jetta (EA888 Gen 3), and 2022-24 Mk8 Golf R & Audi S3 (EA888 Gen 4).. Motorsport-grade Bosch EV14 injectors deliver the fuel capacity real Stage 3+ power demands, 980cc/min each in a four-injector set (0280 158 040). 30° single cone spray angle, 0° bent/gamma angle, 24mm extended-tip nozzle, and 33.6mm compact body for precise atomization in tight quarters. Requires matching APR Stage 3+ ECU software to operate, the fueling backbone behind every Stage 3+ Golf R, S3, and TT/TTS build. APR fuel distribution block included, everything needed to feed all four injectors from stock fuel lines. APR 15-20 Audi A3 Quattro/S3/15-19 Volkswagen Golf R/GTI EA888.3 (8V/MK7) 2.0T Port Injection System. OEM-style fuel rail, rail sensor, and mounting hardware included for a clean, factory-fit install. Top-feed design with 12 ohm coil resistance for reliable, OEM-level electrical compatibility. E85 and M100 compatible for maximum power potential on high-octane and flex-fuel builds. Supports up to 8 bar of fuel pressure for aggressive motorsport-level tunes. Plug-and-play APR Bosch Jetronic-to-OEM harness, no splicing, no guesswork. APR Multi-Port Injection (MPI) System (EA888 Gen 3 & Gen 4). APR FUELING STAGE 3 MPI. MPI Fueling Kit. S3+ MPI Kit

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