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The FTI Performance Pro Powerglide Level 4 Transmissions PPG4 is a 2-speed Chevy Powerglide racing transmission built for serious drag racing, bracket racing, high-horsepower competition, and purpose-built performance applications. Rated at 1,100 advertised horsepower, this FTI Pro Powerglide Level 4 transmission features a full manual valve body, included trans-brake, 1.80 first gear ratio, 300M TH350/400-style input shaft, hardened 4340 output shaft, billet steel clutch hub, aftermarket natural aluminum SFI-approved case, deep aluminum pan, and SFI 4.1/30.1 rating.

The FTI Performance TH400 Level 4 Transmissions TH400-4K21 is a 3-speed remanufactured Chevy TH400 automatic racing transmission kit built for compatible drag racing, weekend bracket racing, high-powered street car, and mud truck applications. Rated at 900 advertised horsepower, this FTI Level 4 kit includes a 3,400–3,800 rpm stall billet torque converter, trans-brake, complete cooler kit, 12 qt. of FTI performance ATF, locking dipstick and tube, deep aluminum pan, hardened steel TH350/400-style input shaft, billet steel clutch hub, and SFI 4.1/30.1 rating.

The FTI Performance TH400 Level 4 Transmission TH400-4S is a high-performance automatic transmission built to handle demanding horsepower and torque levels. Designed around the legendary GM Turbo-Hydramatic 400 platform, this Level 4 performance transmission delivers strong internal durability, reliable shifting performance, and dependable drivetrain operation for race builds and high-performance street vehicles.