Action Clutch 18-21 Subaru WRX 2.0L (FA20DIT) Turbo AWD Stage 4 Clutch Kit (1MD) turn14-in-stock Using a wideband air/fuel controller

Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency

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Manufacturer Part # : 85835

Action Clutch 18-21 Subaru WRX 2.0L (FA20DIT) Turbo AWD Stage 4 Clutch Kit (1MD) turn14-in-stock Using a wideband air/fuel controllerManufacturer Part # : ACR 1819 FFW Market Description Action Clutch's Stage 4 (1MD) Clutch Kit is designed to withstand even the most challenging conditions. Featuring a heavy duty single diaphragm pressure plate, reinforced drive straps, and an Unsprung MIBA Ceramic (available in a 4 or 6 puck) disc, this kit provides peak performance and extreme durability for low mild horsepower vehicles. Our Unsprung MIBA Ceramic clutch kit provides quicker