AEM 3.5 Bar Map Sensor Stainless Kit 1/8NPT -4

A map sensor is necessary when tuning an engine via speed-density. Most standalone ECU's run off of speed density instead of air flow. Whether your car had an air flow meter from the factory, or your factory MAP sensor does not go high enough for the amount of boost you may be running, getting an aftermarket map sensor will tell the ecu how much pressure is in the system, a value that is needed for tuning.

AEM Map Sensors are high quality, durable, accurate, and stand up to the torture tests of racing. When picking a map sensor, you should pick the smallest map sensor that will provide you with enough "gauge pressure" to read the amount of the maximum boost you plan on running. This list below should help you

2.0 bar Map Sensor will read a maximum of 14.3 psi of Boost
3.0 bar Map Sensor will read a maximum of 28.8 psi of Boost 
3.5 bar Map Sensor will read a maximum of 36.0 psi of Boost 
4.0 bar Map Sensor will read a maximum of 43.3 psi of Boost 
5.0 bar Map Sensor will read a maximum of 57.8 psi of Boost 

For Reference: 
1 bar = 14.5 psi
1 atmosphere = 14.7 psi
1 atmosphere is reserved for vacuum

3.5 BAR / 50 PSIa MAP Stainless Steel Sensor Kit. Stainless Steel Sensor Body. 1/8" NPT Male Thread. Includes: 3.5 BAR / 50 PSIa Stainless Steel Sensor, Connector, Pins, 1/8" NPT to -4 Adapter & 1/8" NPT to 3/16" Barb Adapter.

Sensor Performance Specifications: 

Accuracy: +/- 1% Full Scale over -40C to 105C includes Repeatability, Hysteresis and Linearity 

Operating Temp: -40C to 105C / -40F to 221F

Burst Pressure: 500PSI 

Response Time: < 1mS 

Wetted Materials: 304L & 316L Stainless Steel 

Vibration: 100 to 2000Hz, 20g Sinusoidal, 3 Axes

Weight: <85g 

Supply Current: <6mA at 5 Vdc

Output: .5 to 4.5Vdc Linear

Transfer Function: PSI = (12.5*(Voltage))-20.95

Elec. Termination: Integral weatherproof connector, includes mating connector & pins(Supply Voltage 5Vdc +/- .5, Ground, Output)