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1995 993 valve guides

Engine

Vehicle Information: Model: 993 C2; Year: 1995; Body Type: Coupe; Total Mileage: 39000;

Greetings, I have a question about the ever failing valveguides in the 993. I remember Bruce mentioning that they were made of the wrong stuff. I've come across an alloy made from manganeze/bronze (NASA derived), ever heard of it? Also, what is your opinion/experience of cross drilling 993 crankshafts for better oiling, and finaly stainless valves vs. OEM/inconel. My quest is to improve on a great engine that should have been better. Thanks for you dedication.Car Use: Combination Street and TrackModifications: Crank,conrods,pistons/barrels,valves,cams,turbos, headers/eksost

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