6.5 diesel ported cylinder heads, 6.5 diesel custom machine work, 6.5 diesel CnC machine work, 6.5 custom replacement parts, 6.5 diesel performance replacement parts, 6.5 diesel align bore, 6.5 diesel balanced rotating assembly, 6.5 diesel performance pistons, 6.5 diesel splayed main caps. 6.5 long blocks for replacement use for various GM Chevrolet and GMC full-size vehicles currently equipped with a 6.2 or 6.5 diesel engines. 6.2 and 6.5 engine blocks, crankshafts, connecting rods, pushrods, lifters, pistons, cylinder heads, valves, valve springs, retainers, rotators, piston oil spray nozzles, oil cooler bypass valves, oil filter bypass valves, main bearings, select fit main bearings, connecting rod bearings, timing chain and gears, camshafts, lifter guides, rocker arms, and oil pump drives. 6.2 and 6.5 engine brackets, bolts and fasteners, dipsticks and tubes, intake and exhaust manifolds, intake adapters, 6.2 and 6.5 engine fuel injection pumps and injectors, new and re manufactured injection pumps. 6.2 and 6.5 engine thermostats, thermostat housings, water pumps, water pump backing plate 6.2, water pump backing plate 6.5, OE Quality replacement radiators. Replacement performance fans and fan clutches.