MAF Kits
There are two types of MAF kits we offer:  Universal MAF Kits and BMW MAF Kits.  MAF parts are also available individually.

The MAF kit is a nice upgrade for air flow meter engines. On smaller engines, gains of around 12 hp and 12 ft-lbs of torque are typical. On larger engines gains of 18hp and 18 ft-lbs are common. You will feel the benefit with a quicker throttle response, smoother acceleration and a more free-reving top end.
E30 M3 engine with stock AFM
E30 M3 with MAF conversion
Give us a call to order any of these products                (949) 521-4661
The main benefit of the MAF conversion comes from the wide open cross section of the MAF sensor. This removes a major restriction from the intake resulting in less pressure drop, better cylinder fill and more power. 

A second benefit of running the MAF conversion is the ability to retune the engine for other mods. The MAF kits come with a calibrator that is used to match the curve of the original air flow meter. The calibrator is also capable of fine tuning the fuel curve to compensate for things like a cold air intake, cams, headers and a free flowing exhaust.


There are two types of MAF kits. The A kit uses the front panel adjustable ARC2-A calibrator. It is on-the-fly adjustable from the driver seat. The P kit uses the laptop programmable PSC1-004. It requires a laptop to tune and is not real-time programmable. The PSC1 will require a few hours to tune vs. 14 minutes for the ARC2-A. However after the PSC1 is tuned you will have a far more precise tune and better performance.

Universal MAF Kits
Universal MAF kits can be used on a wide range of applications like BMW, Porsche, Mercedes Benz, Volvo, Alfa Romeo, etc. In general the universal kits are compatible with most Motronic air flow meter systems. The kits do not work with L-Jetronic systems because of their higher operating voltage range. To make sure that your car is compatible with the universal kit, you can measure the airflow signal from your stock sensor. Measure the voltage with ignition on and engine off. Move the flapper over its entire range of travel. If the signal stays with the range of zero to 5V, your system is compatible with the universal kits. If your air flow signal goes above 5V, we may be able to offer a solution using the higher voltage PSC1-009 calibrator. 

In addition to the choice of either the A (ARC2-A) or P (PSC1-004) kits, the universal kits also are available with either the MAF 3.0 or MAF 3.5 sensors. There is more information about these sensors in Sensors.

Universal MAF 3.0 - A Kit
Includes:  MAF 3.0 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, Instructions

SS-MAK3 - A Kit

$898.00

Universal MAF 3.0 - P Kit
Includes:  MAF 3.0 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, Instructions
 

SS-MAF3 - P Kit

$774.00
Universal MAF 3.5 - A Kit
Includes:  MAF 3.5 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, Instructions 

SS-MAF3.5 - A Kit

$920.00

Universal MAF 3.5 - P Kit
Includes:  MAF 3.5 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, Instructions
 

SS-MAF3 Kit - P Kit

$793.00
BMW MAF Kits
These MAF conversion kits are designed for specifically for BMW models listed below in your choice of both A and P:
BMW MAF E30 325i - A Kit
Includes:  MAF 3.0 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.0” to 2.5” Reducer/Coupler/Clamps, Instructions
 

SS-MAFK E30 325i - A

$944.00

BMW MAF E30 325i - P Kit
Includes:  MAF 3.0 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.0” to 2.5” Reducer/Coupler/Clamps, Instructions 
 

SS-MAFK E30 325i - P

$811.00

BMW MAF E30 M3 - A Kit
Includes:  MAF 3.5 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 4” Elbow/Coupler/Clamps, 4.0” to 3.5” Reducer/Clamps, Instructions 

SS-MAFK E30 M3 - A

$975.00

BMW MAF E30 M3 - P Kit
Includes:  MAF 3.5 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 4” Elbow/Coupler/Clamps, 4.0” to 3.5” Reducer/Coupler/Clamps, Instructions 
 

SS-MAFK E30 M3 - P

$909.00

BMW MAF E28 535i - A Kit
Includes:  MAF 3.0 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.5” to 3.0” Reducer/Coupler/Clamps, Instructions 

SS-MAFK E28 535i - A

$954.00
BMW MAF E28 535i - P Kit
Includes:  MAF 3.0 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter,  3.5” to 3.0” Reducer/Coupler/Clamps, Instructions 
 

SS-MAFK E28 535i - P

$854.00

BMW MAF E28 M5 - A Kit
Includes:  MAF 3.5 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.5” to 3.0” Reducer/Couplers/Clamps, Instructions 

SS-MAFK E28 M5 - A

$954.00

BMW MAF E28 M5 - P Kit
Includes:  MAF 3.5 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.5” to 3.0” Reducer/Couplers/Clamps, Instructions  
 

SS-MAFK E28 M5 - P

$828.00

BMW MAF E34 535i - A Kit
Includes:  MAF 3.5 Sensor, MAF 3.5 Adapter/Coupler, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 4” Elbow/Clamps, 3.5” to 3.0” Reducer/Clamps, 4.0” to 3.5” Reducer/Clamps, Instructions
 

SS-MAFK E34 535i - A

$975.00

BMW MAF E34 535i - P Kit
Includes:  MAF 3.5 Sensor, MAF 3.5 Adapter/Coupler, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 4” Elbow/Clamps, 3.5” to 3.0” Reducer/Clamps, 4.0” to 3.5” Reducer/Clamps, Instructions 
 

SS-MAFK E34 535i - P

$931.00

BMW MAF M635csi - A Kit
Includes:  MAF 3.5 Sensor, ARC2-A Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.5” to 3.0” Reducer/Couplers/Clamps, EGO1 Oxygen Sensor, Weld Bung, Instructions 

SS-MAFM634csi - A

$984.00


BMW MAF M635csi - P Kit
Includes:  MAF 3.5 Sensor, PSC1-004 Air/Fuel Calibrator, MAF Wire Harness, ARM1 Air/Fuel Meter, 3.5” to 3.0” Reducer/Clamps, EGO1 Oxygen Sensor, Weld Bung, Instructions   
 

SS-MAFK M635csi - P

$872.00

BMW MAF Kits

Most of these parts are used in the MAF kits that can be bought separately.


SS-2.5 Coupler $8.00    
SS-3-2.5 Reducer $28.00
SS-3.0 Coupler $8.00
SS-3.5-3 Reducer $30.00
SS-4.0 Coupler $8.00
SS-4-3.5 Reducer $32.00

SS-4 90 Elbow $58.00