Porsche 911 Copper Base Shim w/4.056" ID .030" thick, Set of 6

Porsche 911 copper base shim for Nickies™ machine-in cylinders, set of 6 pcs. 4.056″ ID, .030″ thick. For Porsche 911 3.0/3.2/3.3 engines fitted with slip-fit 103-95, 103-97, 103-98, and 103-100/103 Nickies cylinders.