Rennline x Storch MAF Sensor Conversion Kit – Fits Porsche 944 / 924S

Note: This item cannot be sold or shipped to California.

The factory Bosch Motronic Air Flow Meter (AFM) found on these Porsches was a reasonable solution for its time, but its design comes with real limitations. The AFM measures incoming air using a spring-loaded door connected to a potentiometer. At low RPMs and partial throttle, where the door is barely open, this mechanical restriction is at its worst, dulling throttle response and making the engine feel sluggish and unresponsive right where you feel it most. At wide open throttle, the AFM cannot accurately read airflow at all, forcing the ECU into a rich, safe-running condition to avoid knock.

The Rennline x Storch VE MAF Conversion Kit solves this permanently. By replacing the AFM with a modern hot-film Mass Air Flow (MAF) sensor — the same technology Porsche moved to in the early 1990s — the intake restriction is eliminated and the ECU gains accurate real-time airflow data across the entire RPM range.

• Eliminates intake restriction from factory AFM spring-door design
• Improves throttle response at low RPM and partial throttle
• Enables accurate WOT airflow measurement
• Modern hot-film MAF sensor technology
• Developed in partnership with Storch Motorsport
• Fits 944 Base 2.5L & 2.7L ('85–'89) | 924S ('87–'88)
• Not for sale or shipping to California