This is the EMPI hpmx 40 idf dual carb kit for all Porsche 356 and 912 engines. This kit comes with a proven hex bar linkage with aircraft heim joints. Includes aluminum carb spacers and all necessary hardware and gaskets. This kit comes with washable air cleaners, and chrome steel base and cover plate. These carbs come to us now tuned with a stamped indentification. They are actually installed on an engine and ran and tuned to ensure function and operation. Depending on motor rejetting may still be needed for your situation.