For tuning purposes it is very important to reduce the moving mass. These valve retainers are made of a titanium alloy and are much lighter than the stock steel parts. When converted to the super-light APE tappets, they hold the shims. Comes as a complete kit for one engine!
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Manufacturer information:
APE
Rosamond Blvd. 7347
Alabama
CA, Rosamond, Vereinigte Staaten, 93560
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