See more: Oil Pump, Cam Plate & Cam Chain Drive
Fits 1999 thru 2005 Dyna, 1999 thru 2006 Touring and 2000 thru 2006 Softail, Zipper's Twin Cam oil bypass shim (pack of 5)
Twin Cam engines feature an oil pressure bypass passage within the cam support plate that is controlled by a spring-loaded plunger. The purpose of this passage is to allow excess oil pressure to be diverted back to the feed section of the oil system. Inconsistencies in 1999-2006 spring length and passage machining can cause the plunger to open prematurely and/or not fully close the passage, resulting in a loss of critical oil pressure and volume at lower RPMs. This shim assures proper spring pre-load, improving oil pressure and volume. Use with factory or aftermarket oil pumps and cam plates.