Horsepower is important, but so is drivability and Chevrolet Performance’s wide range of automatic and manual performance transmissions helps make the most of your vehicle’s performance capability – on the street, strip or freeway. We’ve also expanded our lineup of manual transmissions for 2014, with the new TREMEC T56 Super Magnum six-speed. It delivers the strength of the heavy-duty TR6060 transmission in a universal package designed to assist LS-engine installations in older vehicles.