A-Premium High Torque Starter Motor 12V 2.5kW (3HP) — 9-Tooth CW for Chevy SBC/BBC, OSGR Gear-Reduction

A-Premium High Torque starter motor delivers 2.5 kW of cranking power in a compact 12V package designed for Chevy small- and big-block race engines.

This heavy-duty OSGR-style starter is built to engage 9-tooth pinions and spin clockwise, making it suitable for many Small Block Chevy (SBC) and Big Block Chevy (BBC) applications with 153 or 168-tooth flywheels. It combines a high-torque motor section with a robust solenoid and comes with a shim kit so you can achieve the correct pinion-to-ring gear mesh. The unit is sold boxed and backed by a one-year unlimited-mileage guarantee from A-Premium.

Will this starter fit my Chevy 327, 350, 383, 396, 454 or 502 engine?

Compatibility centers on flywheel tooth count and starter rotation. If your engine uses a 153- or 168-tooth flywheel and requires a clockwise (CW) starter, this A-Premium model is a match for many Small Block and Big Block Chevy builds. Check the starter's mounting pattern and reference numbers against your vehicle before ordering.

• Designed for SBC and BBC race engines with 153 or 168-tooth flywheels.
• Clockwise rotation to match common Chevy starter installations.
• Reference cross-list: 18493, 22202HI, 41044033, 46835 and others.
• Confirm mounting flange and electrical connections before purchase.

How much power and torque does this starter provide?

This starter delivers 2.5 kW (approximately 3 horsepower) of cranking output from a 12V electrical system, optimized for high-compression and performance engines that require strong initial spin. The OSGR design gives a compact, gear-reduction drive that multiplies torque at the pinion for reliable engagement with large flywheels.

• Rated power: 2.5 kW (3 HP) at 12 volts.
• Gear-reduction (OSGR) increases starting torque compared with direct-drive units.
• 9-tooth pinion for correct engagement with specified flywheel counts.
• Clockwise rotation compatible with many Chevy configs.

What’s included and what should I inspect during installation?

The package includes the starter motor and a shim kit in a protective box. Before installing, verify the pinion alignment, secure electrical connections, and use the shims to obtain the correct clearance between pinion and ring gear to prevent premature wear or noise.

• Package: 1x starter motor plus shim kit, boxed for protection.
• Inspect mounting flange, bolt threads, and terminal hardware for fitment.
• Use included shims to set pinion-to-ring gear backlash correctly.
• Tighten all electrical connections and test cranking under load.

What warranty and support does A-Premium offer?

A-Premium provides a one-year unlimited-mileage guarantee on this starter motor, covering manufacturing defects and workmanship. Their catalog includes a wide range of automotive accessories so you can source related installation parts or replacement items from the same brand.

• One-year unlimited-mileage guarantee for peace of mind.
• Manufacturer support and cross-reference list for fitment checks.
• Boxed packaging reduces transit damage risk.
• Wide accessory selection from A-Premium for complementary parts.

Who is this for: This starter motor is intended for DIY mechanics, race-car builders, and performance engine shops installing or refurbishing Small Block and Big Block Chevy engines that require a clockwise, 9-tooth OSGR starter and 2.5 kW of cranking power. If you need a compact, high-torque unit that fits 153 or 168-tooth flywheels and want the support of a one-year guarantee, this A-Premium model is a practical choice. Always confirm mounting pattern, rotation, and flywheel tooth count before purchase to ensure a correct swap.