A-Premium High-Torque 3HP 12V Starter Motor 9-Tooth CW OSGR with Shim Kit

The A-Premium High Torque 3HP starter motor is a 12V, 2.5KW OSGR unit with 9 teeth and clockwise rotation, built to crank small- and big-block Chevy race engines reliably.

Designed for performance and durability, this starter replaces a range of OEM reference numbers and fits Small Block Chevy (SBC) 327, 350, 383 and Big Block Chevy (BBC) 396, 454, 502 engines that use 153- or 168-tooth flywheels. The unit combines a robust high-torque motor with an over-running starter gear (OSGR) design to reduce gear wear, and it ships with a shim kit for proper fitment and alignment.

Will this starter fit my Chevy race engine?

Compatibility depends on your engine type and flywheel tooth count. This A-Premium starter was engineered for common SBC and BBC race engines and replaces multiple legacy reference numbers for easier cross-referencing.

• Fits: Small Block Chevy 327, 350, 383 and Big Block Chevy 396, 454, 502
• Works with 153- or 168-tooth flywheels
• Cross-references: 18493, 22202HI, 41044033, 46835 and others
• Includes shim kit to adjust centerline and engagement

How powerful and what are the electrical specs?

This starter delivers 2.5 kW (approximately 3 horsepower) on a 12V system, giving strong cranking torque for high-compression performance engines. The OSGR design helps protect the starter and ring gear during repetitive starts common in racing and tuning environments.

• Power rating: 2.5 kW (3 HP)
• Voltage: 12V — suitable for standard automotive battery systems
• Rotation: Clockwise (CW)
• Teeth: 9-tooth pinion, engineered for proper engagement with specified flywheels

What hardware and warranty come with the unit?

The package contains the starter motor and a shim kit to help achieve correct clearance and alignment during installation. A-Premium backs the starter with a one-year unlimited-mileage guarantee to support installation confidence and post-sale service.

• Included: 1x high-torque starter motor and shim kit in a protective box
• Packaging: boxed for safe shipping and storage
• Warranty: one-year unlimited-mileage guarantee from A-Premium
• Support: parts cross-reference provided for easier replacement selection

How do I install it and what should I check during fitment?

Installation follows standard starter replacement steps: disconnect battery, remove old starter, test clearances, install new starter with supplied shims, and torque mounting hardware to factory specs. Check pinion engagement and starter centerline to avoid premature wear.

• Disconnect negative battery terminal before work
• Use shim kit to fine-tune pinion-to-ring gear clearance
• Confirm clockwise rotation and 9-tooth compatibility with your flywheel
• Tighten mounting bolts to manufacturer torque values and retest cranking

Who is this for: This A-Premium High Torque 3HP starter is aimed at racers, engine builders, restorers and enthusiasts running Small Block or Big Block Chevy engines that require a robust, high-torque 12V starter with OSGR protection. It’s a practical upgrade for high-compression or race-prepped engines that need reliable cranking, straightforward cross-referencing to legacy numbers, and a one-year guarantee for peace of mind.