Double bunk 300 inch wheel base with 60 series Detroit. 9 speed transmission. 785,000 actual miles. Little Over 300,000 on overall with paperwork. Motor can be set 425 hp to 550 hp, has all close to new 11R245 michelin virgin tires, dual 150 gallon fuel tanks. runs and drives great! 5000.00 worth of tires alone.