Family-owned and operated since 1961, ATI Performance Products makes high-performance racing components, with automatic transmissions and torque converters at the heart of its Baltimore-area operation. What began as Jim Beattie’s modest transmission rebuilding shop now includes in-house manufacturing, more than 30 CNC machines, and products tested on the drag strip by the Beattie family. ATI also holds more than a dozen U.S. government patents and builds specialized converter-rebuilding equipment alongside its racing parts.
SFI
Competition Transmission and Converters, LLCFounded in 1983, Competition Transmission and Converters builds custom transmissions and torque converters for everything from street rods to dragsters in Western New York and beyond. Owners Carl and Joan Ettipio bring more than 35 years of racing experience to drivetrain work, with converters built and computer balanced in-house and transmissions tailored to demanding street, circle-track, and dragstrip applications.NEW HYDE PARK, NY
Gearstar Performance TransmissionIn Akron, Gearstar Performance Transmissions builds high-performance automatic transmissions tailored to an engine’s power, gearing and intended application. Owner Zack Farah came out of a high-volume transmission operation more than 25 years ago to focus on the custom performance work that off-the-shelf units could not provide. Each transmission is handled by one builder, and the company remains under its original owner while its employee-owned team serves automotive enthusiasts across the country.AKRON, OH
ProTorqueFounded in 1983 as a local torque-converter rebuilder, ProTorque now manufactures custom performance torque converters through its in-house R&D and production operation. A division of Boninfante Friction since 2020, the company develops converters for applications ranging from street cars to professional drag-racing machines, matching each unit to the engine and vehicle combination rather than relying on stall speed alone. Its American-made products have helped drag racers set records and win championships, including in NHRA competition.BOHEMIA, NY
Rockland Standard Gear, IncRockland Standard Gear builds and remanufactures manual transmissions, transfer cases, and related powertrain components, with its Tranzilla Magnum conversions at the heart of its performance work. The company says it has a 30-year track record and builds more than 100 units each week, while its specialty work includes remanufacturing the Corvette ZF S6-40 for ZF and GM—the only North American source for those parts. RSG also backs its products with customer technical support and a stated inventory exceeding $1 million.SLOATSBURG, NY