SBF Protorque Maximum Starter AT/4&5 MT

The SBF Protorque Maximum Starter AT/4&5 MT from CVR Performance is purpose-built for small-block Ford engines requiring reliable, high-torque cranking power across both automatic and manual transmission applications. Whether you're rebuilding a classic muscle car, upgrading a street machine, or tuning a weekend racer, this premium starter delivers the cranking force necessary to turn over modified engines with confidence. Designed for enthusiasts and professional mechanics who demand durability and consistent performance, the Protorque Maximum addresses the limitations of stock starters in high-compression and heavily modified powerplants.

CVR Performance engineered this starter with a maximum-torque design that increases cranking force compared to OEM units, allowing it to reliably spin over stubborn engines without bogging down or stalling mid-crank. The robust construction and heavy-duty internals handle the demands of high-compression builds, forced-induction setups, and cold-weather starting without hesitation. Compatible with both 4-speed and 5-speed manual transmissions as well as automatic configurations, this versatile unit eliminates the need for multiple starters across your build program, simplifying inventory and installation logistics on the shop floor or in the home garage.

Mechanics upgrading SBF-powered vehicles—whether carbureted classics, fuel-injected restorations, or modern EFI conversions—will appreciate the straightforward bolt-in fitment and proven reliability that CVR Performance brings to the table. The starter's compatibility with both AT and manual-transmission bellhousings makes it an ideal choice for engine swaps, rebuild projects, and power-plant upgrades where transmission flexibility is essential. At 10.535 lbs and compact dimensions of 8 x 6 x 12.9 inches, installation in tight engine bays is manageable, and the unit's reputation for longevity means fewer callbacks and warranty issues for professional shops.