Description Gates “OEM replacement” Idler Pulley for the 89-99 DSM 4G63 cars, 87-92 Galant VR4, and Evo 1 through 9 cars. This is the pulley that is non-eccentric and bolts onto your engine mounting bracket.  (OEM part # MD156604) *******Please note:  If you have a 1990 model year or earlier car, you will need to order the correct bolt ( MF241281 ) for this pulley if it hasn’t already been updated.**********