Stroker Kit: The heart of the E12 was sourced from a Group 4 3.0 E9 CSL Ron has been restoring. Built by Dinan years ago, the punched out 3.9-liter stroker M30 sports a 306 cam, with air piped in through triple 45DCOE Weber carbs and a truly rare Dinan airbox, and out through an all-stainless exhaust. The high-strung NA lump makes the subtle E12 scream its way down the road.