These Aeroflow rocker arm bridge shim kits will correct excessive hydraulic lifter preload on Australian V8 engines with bridge-mounted rocker arm assemblies. Excessive preload could be due to a cam change, head resurfacing or when reconditioning a cylinder head. These shims can be a quick and easy alternative to resorting to different length pushrods. The 32-piece kit includes 16 thin and 16 thick shims, which can be used to reduce lifter preload by .030" (thin shim), .060" (thick shim). To attain .090" reduced preload, you must stack the shims.

Dimensions of Each Shim:

• Outside Diameter: 14.25mm
• Inside Diameter: 8.20mm
• Thickess of Thin Shim: 1/64" (0.50mm)
• Thickness of Thick Shim: 3/64" (1.00mm)