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Aluminum heads,18 headbolts per side, egr cooler- egr valve- egr control module all one unit. High pressure pump is in the front. 2 water pumps. Reverse flow (exhaust ports on top of the engine). 90% of all repairs are "cab on".1 large turbo (actually 2 turbos, one shaft), its a VGT. Torqueshift goes away (replaced with 6R140)