Wideband Air/Fuel Ratio: 6:1-20:1 AFR - Carbon Fiber Digital Gauge (2 1/6") Zaklee K&N's cabin air filter refresher

K&N's cabin air filter refresher increases the electrostatic properties of the cabin air filter helping it to trap contaminants

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(Boost) 30-2131-50 -30 to +50psi 30-4408 (Boost) 30-2131-75 0 to +100psi 30-4401

Features a larger surface area and thinner 2

2008-2012 Subaru WRX with R180 Rear Differential Conversion

Wideband Air/Fuel Ratio: 6:1-20:1 AFR - Carbon Fiber Digital Gauge (2 1/6") Zaklee K&N's cabin air filter refresherFits these Applications: Universal Product Knowing the exact air fuel mixture running through your engine is the most important factor to extracting the highest levels of performance and durability. Not all wideband gauges are created equal. AutoMeter utilizes an advanced calibration method that automatically calibrates your gauge on every startup to assure you of the highest degree of accuracy over the entire lifespan of your sensor (no free air