FTI 9.5in 700R4/Early 4L60 Billet Lock-Up Street Racer Series - LT - 27 Spline - 3800 Stall

If you're looking to get more out of your 700R4 or early 4L60 transmission, especially in a performance street application, a high-stall torque converter like this one from FTI Performance can make a big difference. This Street Racer Series converter is built with a billet front cover and a billet lockup piston, designed to handle the extra stress and prevent premature wear that can happen with stock converters under spirited driving. It's a substantial upgrade for vehicles like the Chevrolet Caprice, Buick Regal, or Pontiac Firebird that are used for more than just daily commuting.

FTI builds these converters with a focus on durability and performance. They use computer-designed, CNC-machined billet components for the cover and lockup piston, which are key to its longevity. The custom stator and blade angle pumps are tuned to achieve a specific stall speed – in this case, 3800 RPM – which allows your engine to rev higher before the converter fully couples, leading to quicker launches and improved acceleration. The fins are furnace-brazed and heli-welded for strength, and it includes a severe-duty sprague and an anti-ballooning flanged impeller hub, making it a very robust unit that's built to last through demanding use.

This particular converter is the 'LT' model, featuring 27 splines and a 9.5-inch diameter. It's designed to be a direct replacement for many GM vehicles from the early 80s through the early 90s. When installing, remember that a higher stall converter often pairs best with a transmission cooler to manage the extra heat generated during operation, and it's always a good idea to follow the manufacturer's specific installation guidelines to ensure proper setup and performance.