The 5.375 diameter crank pulley is the standard size for all engine accessory packages except the RY45. The 4.8125 diameter pulley can be substituted into any kit if a different pulley drive ratio is desired. We offer two different locations for the oil pump drive pulley. The setup shown in drawings for all the engine accessory packages is used with Dailey billet dry sump pans. The second can be used with older dry sump designs. We also carry shims to move the oil pump drive pulley further out if needed. Part numbers of the components for the older dry sump designs are 11-1706 and 11-1716, this replaces parts numbered 11-1712 and 11-1713.
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