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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, 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, 30-spline hardened steel TH350/400-style input shaft, 2.43 first gear ratio, billet steel clutch hub, and SFI 4.1/30.1 rating.Add to cart
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The FTI Performance TH400 Level 4 Transmissions TH400-4S is a remanufactured 3-speed automatic racing transmission built for serious Chevy-pattern performance applications. Designed with a full manual valve body, reverse shift pattern, trans-brake, 900 horsepower advertised rating, SFI 4.1 / 30.1 rating, and heavy-duty internal components, this FTI TH400 Level 4 transmission is built for drag racing, high-powered street cars, bracket racers, and mud truck applications that need strength, control, and race-ready shift performance.Add to cart
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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.Add to cart
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The FTI Performance TH400 Level 4 Transmissions TH400-4UB is a 3-speed remanufactured Chevy TH400 automatic racing transmission built for compatible drag racing, high-powered street, bracket racing, and mud truck applications. Rated at 900 advertised horsepower, this FTI Level 4 transmission features a reverse shift pattern, full manual valve body, included trans-brake, Ultra Bell bellhousing, hardened steel TH350/400-style input shaft, billet steel clutch hub, deep natural aluminum pan, 4.063-inch tailshaft, slip-on yoke style, and SFI 4.1/30.1 rating.Add to cart
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The FTI Performance TH400 Level 4 Transmissions TH400-4UB is a 3-speed remanufactured Chevy TH400 automatic racing transmission 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 TH400 features a reverse shift pattern, full manual valve body, included trans-brake, Ultra Bell bellhousing, deep natural aluminum pan, 4.063-inch tailshaft, 30-spline hardened steel TH350/400-style input shaft, 2.43 first gear ratio, billet steel clutch hub, and SFI 4.1/30.1 rating.Add to cart
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