Engine Block Oil Passage Enlargement Drill Bit 12

Big block Mopars generally have a very good oiling system from the factory. However, one easy modification recommended by Mopar Performance is to enlarge the passages which go from the passenger side main oil galley to the main bearings. This allows extra oil to both the main and rod bearings, and only takes a few minutes to do with any hand drill. We carry the special 12" long drill bit required, which should be a standard part in any mechanic's tool box who is building high performance big block Mopar engines. Click on the "view additional images" button to see a diagram of which exact oil passages to enlarge with this drill bit.