Owner operator specd 2016 Peterbilt 579. Custom caterpillar c15 acert (mxs 2005 year) installed with 550hp and 1850 torque. 10 spd ultrashift with 2.93 rear ends. Brand new clutch. Completely brand new custom air conditioning system. Brand new virgin Firestone lo pro 22.5 tires. Espar heater, flat screen tv, side storage boxes. Half fenders. Full disc brakes. Immaculate condition. 400k on caterpillar c15 motor and 700k on frame. NEVER been in oilfield. Over 280 hours of labor into this conversion. Runs excellent!