Keeping you Ready for the Road Ahead , the Delco Remy 31MT 12V 10-Tooth Starter Motor is a great choice for medium duty applications. With the development from the popular 29MT design, these new starters provides 10% more peak engine power than the competition, easing problems and concerns of repairs or replacements. In the case of tooth abutment, the armature rotation in full power clears the abutment to allow pinion engagement. This benefit allows this medium duty starter motor to be the preferred choice for vehicles with numerous starts and stops. FleetPride is your First Click in Heavy Duty .