Light Weight Aluminum Crank Crankshaft Pulley 99-05 Mazda Miata 1.8L with BP-4W engine // Part # CP549This light weight racing crank pulley will fit the 1999 2005 Mazda Miata with the 1. 8L BP 4W engine. It weighs just 1 pounds and 9 ounces, is factory balanced, has factory timing marks and is of stock size and configuration, so there is no need to change the belts! This is a lightweight 6061 T6 billet aluminum CNC machined crankshaft pulley with tolerances kept down to . 001, which are usually reserved for aircraft and military designs. This pulley