Porsche 911 Copper Base Shim w/4.134" ID .010" thick, Set of 6

Porsche 911 copper base shim for Nickies™ machine-in cylinders, set of 6 pcs. 4.134″ ID, .010″ thick. For Porsche 911 3.0/3.2/3.3 engines fitted with machine in 103-100/105 Nickies cylinders.