Alto Standard 91434 Replacement Clutch Kit Alto Standard Clutch Kit 91434 includes the following: Clutch Disc with OD measurement of 9 1/8" with 1 1/8" Hub and 26 Teeth, Clutch Cover, Release Bearing, Pilot Bushing, and Alignment Tool. About AltoAlto Products Corp. is the oldest and largest independently owned and operated automatic transmission clutch plate manufacturer in the world. Alto is an ISO certified OE manufacturer of automatic transmission clutches for over 60 years. Alto manufactures and distributes a complete range of automatic products and standard clutch systems for automotive, agricultural, heavy duty on and off highway applications. All components are manufactured in-house, or sourced from an Alto approved partner.Quality is the cornerstone of customer confidence. Alto Products are engineered to meet or exceed customer satisfaction. The process begins with testing of all incoming materials, followed by controlled checks through all phases of processing, finished by a final check of each and every part. Our Statistical Process Control program ensures the integrity of every part. Quality, value, and service is our goal at Alto. Installing an Alto Product in your vehicle is not just the best decision. It's the only decision.