MSD DynaForce SBF Billet Aluminum High Torque Mini Starter. These starters are 4.4:1 gear reduction and have a high powered 3.4 horsepower motor with dual winding solenoid. Starter works with Big Block Ford 351M, 400 and 429 engines. Starter is capable of handling up to 18:1 compression. Billet aluminum mounting flange features 3 position indexing and can be rotated into multiple positions to fit all applications. Other features include an ultra high strength pinion gear, sealed ball-bearings and dual windings solenoid to ensure maximum reliability. Starter has been powdercoated red for long lasting protection.