1515 Old US Hwy 31 N. 1995 Detroit Series 60 12.7 Liter. DDEC III Diesel Engine. Stock # R 2125. (Only Applies To Good Running Engines, Excludes Cores/Take Outs). We remove Valve Covers and Oil Pans to inspect the Internal parts to ensure quality. Worldwide Diesel Pays for your core to come back. Easy Simple Core Criteria (Complete flywheel to fan hub, Turns 360, and no holes in the block). For More Information Contact.