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RB Products 0.1mm Head Shims
This is a pack of five 0.10mm (0.004") head shim gaskets for RB Concept Long Stroke .21 engines, such as the C5, C5BB, and C6 family engines. These head shim gaskets are also used in the Buggy 9, Circuit 9, Classico 9, and Rally 9 family engines.
The head shim is the thin circular piece that goes between the head button and the top of the cylinder sleeve and can be used to adjust and fine tune the compression of the engine. In general the higher the nitro percentage of the fuel you run, the more head shims you should put in your engine. Please consult the instructions that came with your engine for details about how much your engine should be shimmed!
This product was added to our catalog on December 14, 2005.
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