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2015-2021 Subaru STI (6MT)
Designed to deliver aggressive styling and functional downforce
Note: No inline check valve is required since Radium catch cans are pressure sealed
2007-2009 Subaru Liberty GT/GT-B BL/BP (EJ25 Single Scroll)
Dinan Underdrive Pulley Kit Phenolic/Thermal Spacers 2015-2021 Subaru STI (6MT)Dinan's underdrive pulley is designed to increase power (11 horsepower 8400 RPM and 7 lb ft torque 8400 RPM on a stock car) by reducing parasitic drag on the engine from spinning the alternator, water pump and AC compressor. This is accomplished by slowing down the speed of these accessory drives that rob power from your engine. Dinan has done extensive hot weather testing so you can be assured that your engine is safe. The Dinan underdrive pulley is
US$ 39.99
US$ 48.00
US$ 25.95