5. Gearstar’s exclusive 10-inch billet cover B82 lockup torque converter is made to handle 800 horsepower. It features a full billet front cover with integrated mounting pads. It’s computer balanced and welded, with a heavy-duty flanged hub and a double-wide carbon-fiber clutch. The 10-inch Billet torque converter is available separately from Gearstar but comes included with the 4L80E.