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You can get the best of both worlds by going with a Hybrid Speed Density setup. With the iWire Hybrid MAF setup it makes this simple. Just plug in the iWire harness to the original Mass Air Flow Sensor (MAF) connector and the other end to the MAF sensor then install the Intake Air Temperature Sensor (IAT) into the intake manifold and tune.
The iWire harness is built to last with Military Spec (Milspec) grade materials like flame retardant, corrosion, and abrasion resistant Tefzel wire. The harness is then wrapped it in Raychem DR-25 heat shrink tube that can withstand the harsh environment of the engine bay. The Intake Air Temerature (IAT) sensor plug is booted and the MAF sensor connector is potted to ensure a true weatherproof seal and secure wire connections.
Built to the same specifications as the MAF harness for a high quality connection that will resist the high temperature engine bay location on the intake manifold.
Standard length from MAF to IAT is 36 inches.
Works with standard intake air temperature (IAT) and manifold absolute pressure (MAP) sensors, sensors not included.
Fits all 2002-2007 WRX and STI models.