Shift Improver Kit for TH2004RB&M'specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid. B&M Performance and Off-Road has been at the vanguard of the growing automotive aftermarket since the early 1950s. Racers themselves, B&M's founders identified the needs of local performance enthusiasts and developed products to fill those needs. B&M'specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, automatic shift handles, extended transfer case handles, cast deep aluminum transmission pans, differential covers, transmission coolers, power steering coolers, automatic transmission fluid, and transmission accessories for performance street, truck, Jeep, and off-road applications.Vehicle Applications: 1981-1990 Oldsmobile Custom Cruiser 1985-1985 Cadillac Commercial Chassis 1981-1981 Pontiac Catalina 1981-1986 Cadillac Fleetwood 1983-1986 Pontiac Parisienne 1985-1987 Oldsmobile Cutlass Salon 1987-1989 Pontiac Safari 1987-1990 Cadillac Brougham 1989-1989 Pontiac Firebird 1982-1987 Chevrolet El Camino 1981-1983 Buick Estate Wagon 1981-1985 Oldsmobile Delta 88 1981-1990 Buick LeSabre 1982-1987 Buick Regal 1982-1988 Chevrolet Monte Carlo 1982-1988 Oldsmobile Cutlass Supreme 1984-1987 GMC Caballero 1981-1986 Pontiac Bonneville 1982-1983 Chevrolet Malibu 1982-1985 Oldsmobile Toronado 1983-1987 Pontiac Grand Prix 1981-1984 Cadillac DeVille 1981-1984 Oldsmobile 98 1981-1985 Chevrolet Impala 1982-1984 Oldsmobile Cutlass Calais 1981-1987 Buick Electra 1981-1990 Chevrolet Caprice 1982-1983 Oldsmobile Cutlass CruiserFits 1981-1990 Chevrolet, Buick, Olds, Pontiac, GMC TH2004R Automatic Transmissions. On Any Stock Automatic Transmission Eliminates Soft/Sluggish Shift Eliminates Shift Overlap Eliminate Clutch and Band Wear Improves Transmission Life Transmission Removal Not RequiredProduct Description: Automatic Transmission Shift Kit Shift Improver TH200-4R 1981-1990 KitB&M® specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid.B&M Performance & Off-Road has been at the vanguard of the growing automotive aftermarket since the early 1950s. Racers themselves, B&M’s founders identified the needs of local performance enthusiasts and developed products to fill those needs. B&M specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, automatic shift handles, extended transfer case handles, cast deep aluminum transmission pans, differential covers, transmission coolers, power steering coolers, automatic transmission fluid, and transmission accessories for performance street, truck, Jeep, and off-road applications.