2011 KW W9 18sp, 336 full locking rear ends, 272 wheel base, 12 gauge air ride frontend. When ordered it had the one of the last CATs in it but now it has a 2WS Cat that needs overhauled, sounds like it dropped a valve. Has 550 HP, 1850 torque. Motor was used when was put in few years ago, miles on truck is about 500,000. Beautiful truck, very flashy,