The new but shorter Pro Mag 12 LT Generator. The major modifications include a 3/4 of an inch shorter height to clear low hanging Sprint Car air cleaners and a newly engineered raised oil passage groove that will prevent oil leakage and provide superior oiling in large cam tunnel engine blocks. Most importantly these generators are built by the professionals in the MSD Focus Factory for unmatched quality assurance. Features: Raised oil passage groove. Designed to clear low hanging Sprint Car air cleaners. 3/4 inch shorter than MSDs standard height 7908 generator. Designed for engine blocks with 50mm, 55mm, and 60mm diameter cam tunnels. Newly engineered raised oil passage groove to prevent oil leakage and provide superior oiling in large cam tunnel engine blocks. For use in raised cam, large cam journal blocks with dry sump oiling systems ONLY.