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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
The JB4 features a simple plug & play installation harness for easy installation & removal and includes many features not found with any other tune
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GFB Lightweight Underdrive 3 Pulley Kit For Subaru WRX STi XT GT 911 992/992.2 (2018-present) The JB4 features a simpleGFB lightweight underdrive pulley kit (part number 2014) is made from anodized aircraft grade billet 6061 T6 aluminium and offers sharper throttle response and faster acceleration. Kit includes: crank, alternator and power steering pulleys, and 1 belt (the original factory A C belt can be re used with this kit). GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) on the crankshaft as well as parasitic loads
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