Kartboy Aluminum Crank Pulley - WRX 2002-2014 / STI 2004-2017 / More
The Kartboy Crank Pulley is a great way to increase performance without any sacrifice. Decreasing rotational mass reduces the strain on the engine. The lightweight crank pulley has the same effect as a lightweight flywheel, just not as dramatic.
Kartboy Crankshaft Pulley weighs in at 2.4 Pounds. A good bit lighter than stock but not light enough to throw a CE light. Free up a little crank HP and get some KB Bling.
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