FTI 9.5in 4L80E/4L85E Billet Lock-Up Street Racer Series - LS - 3800 Stall

The FTI Performance SRL Series billet lockup torque converter is a high-performance component designed for demanding street and racing applications. Featuring a CNC-machined billet front cover and billet lockup piston, it significantly reduces premature clutch wear, enhancing durability and reliability. The converter incorporates custom stator designs and multiple blade angle pumps, allowing stalls from 2,800 to 4,400 rpm to match specific driving styles and power levels. Its construction includes furnace-brazed and heli-welded fins, a severe-duty sprague, and an anti-ballooning flanged impeller hub, making it virtually indestructible and suitable for high-stress use.

This torque converter is compatible with 4L80E and 4L85E transmissions, specifically designed for vehicles with LS engines and 3800 stall requirements. It is a direct replacement or upgrade for stock units, ideal for street, strip, or performance driving where reliable lock-up and high stall are needed. Custom-built to meet precise specifications, it offers improved torque transfer, reduced heat, and enhanced efficiency. Installation typically involves standard bolt-on procedures, and the converter is suited for use in performance-oriented vehicles seeking increased acceleration and drivability.