PAC Racing Valve Spring Shim Kit - 1.250" OD - 0.575" ID - Steel RS003C0113 The metering system includes a

The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response

Laser Engraved Holley Logo And Inlet/Outlet Markings

Gerotor displaces 25% more volume of oil than the 10687 and gerotor set assembled to an extended drive shaft that allows for additional support in the cover

Magnetic Drain Plugs collect steel particles

PAC Racing Valve Spring Shim Kit - 1.250" OD - 0.575" ID - Steel RS003C0113 The metering system includes aProduct Description: Valve Spring Shim 0. 015 0. 020 0. 030 0. 050 in Thick 1. 250 in OD 0. 570 in ID Steel PAC Racing Springs is part of the Race Winning Brands Family. With more than 100 years of spring manufacturing experience. We understand the demands of racing and provide a commitment to all of our customers to provide the best service possible. We continue to expand products and offer expanded onsite technical services at various racing events.