SpeedFactory 3 Bar MAP Sensor for Honda B D F H Series

SpeedFactory 3 Bar MAP Sensor for Honda B, D, F, and H Series

The factory Honda MAP sensor was built for a naturally aspirated engine, and it tops out reading only about 10 psi of boost. The moment you bolt on a turbo and ask for more than that, the stock sensor is blind above its ceiling and your tune has no idea what is actually happening in the manifold. The SpeedFactory 3 Bar MAP sensor fixes that. It reads accurately well into boost on a true linear 0 to 5 volt scale, so your engine management can see real manifold pressure and you can set a boost cut to protect the motor. That boost cut alone has saved a lot of engines from a spike or a wastegate problem letting boost run away.

This is a plug-and-play upgrade in an OEM-shaped housing, dimensionally identical to the stock sensor, so there is no splicing the harness or rewiring to make it fit. It drops into the B, D, F, and H series cars and the 00-05 S2000, looks factory once it is in, and reads boost the stock sensor never could. SpeedFactory hand assembles and function-checks each one in the USA, and because the pressure-to-voltage scale is truly linear, you do not need to re-tune every time the altitude changes the way you do with some sensors.

How much boost it actually covers

Here is the honest version, because the spec gets thrown around loosely. A 3 bar sensor measures three atmospheres of absolute pressure, which works out to a usable boost ceiling of right around 21.75 psi once you set a boost cut in your engine management. You will see "1 to 29+ psi" listed around the web, that is the raw scale, but the real-world number you should plan your build around is about 21.75 psi. If your target is at or under roughly 20 psi, this sensor is perfect and gives you clean resolution across that whole range. If you are planning a high-boost build that will push past that, look at a 4 bar sensor instead, which reads to around 43 psi. Sizing the sensor to your actual boost target is what gives you the best tuning resolution, so be honest with yourself about where the build is going.

Specs

Color options

Red and black are the exact same sensor. The color is the housing, nothing else, so there is no performance difference. Pick whichever you like.

Fitment

This sensor fits B, D, F, and H series engines and the 00-05 S2000, in the cars listed below. It is engine-based, so what matters is that your car uses a throttle-body-mounted MAP sensor, which all of these do.

Two fitment notes worth catching before you order. The 90-93 Integra works but needs a 94-01 Integra throttle body to mount the sensor. The Accord fitment is 4-cylinder only, and the 01-03 CL is the V6 premium only. Everything else on the list is all models.

What to know before you buy

The big one: this sensor does nothing on its own. It requires a programmable engine management system, something like Hondata or KTuner, and a proper tune that is calibrated for a 3 bar sensor. If you install this and do not tell your engine management it is now reading a 3 bar sensor, the car will run wrong, because the ECU will be interpreting the new voltage scale with the old calibration. This is a tuning component, not a plug-in power part. If