Looks aren't everything. . but with regard to torque converters, they can hide the secret to winning races. For sanctioning bodies that mandate the use of a "stock appearing" converter, TCI® Circle Track Torque Converters satisfy the rulebook requirements while delivering a distinct performance advantage. Our TCI® Circle Track Torque Converters are specially designed with a lower "positive lock-up" stall speed, eliminating approximately 10% of the power robbing slippage found in OEM and lesser quality converters. On the track, this results in huge off-the-corner acceleration improvements and the ultimate in "green flag" starting speed. Built with a heavy-duty stator, furnace-brazed fins and precision certified stall speed to maximize efficiency, these stock appearing converters usually reduce lap times by 1-2 tenths of a second. In addition, TCI® Circle Track Torque Converters feature reduced rotational weight, improving engine braking in corners - lowering transmission operating temperatures.Pit Stop USA offers TCI Circle Track Torque Converter - TH350/400 - 10" Diameter - Dual Bolt Pattern - 2,300-2,600 Flash Stall Speed - SB Chevy 350+ - 26 lbs. 241021 at low everyday prices. Be sure to check out all of our products from TCI Automotive including TCI Automotive Torque Converters.