when engine was built I had put brand new oem parts, i spared no expense building it. New engine, injector, glow plug harnesses, new 6.4 starter, alternator, water pump, rockers, lifters, HPOP, and engine is fully blue printed and balanced with billet flex plate, R&R rods, billet LPOP gears, ATI damper, Stage 3 colt cam and valve train, Mahle forged coated delipped and valve relief pistons, heads and block o-ringed