This engine stud kit is a pack of four fully threaded steel studs and four hex nuts. For beginners, these are the long threaded rods that slide through your 4-cycle engine and into the motor mount, locking the motor down so it stays put when you hammer the throttle on the track.What matters is staying in the race. Karting vibration or a light get-off can strip a thread in seconds and leave you parked. Racers keep this kit in the trailer for fast swaps on LO206, Briggs & Stratton, and other 4-stroke motor mounts used in sprint kart and dirt kart setups. Kit Contents: 4 studs, 4 nuts Stud Type: Fully threaded Nut Type: Hex Material: Steel Related Products Complete Dzus Fastener Kit with 8 Each of Buttons, Springs, and Rivets Complete Bolt Kit for Mini-Lite Brake Hub Installation Performance Manufacturing 1/2" ID Kingpin Washer Kit - 7/8" OD - Universal Sprint Chassis Blue Anodized Conical Seat Washer for Secure Kart Mounting π Product Highlights This kit secures 4-cycle kart engines to the motor mount. Includes four fully threaded steel studs and four hex nuts. Studs slide through the engine to lock it firmly in place. Hex nuts provide simple installation using standard tools. Steel construction resists damage from racing vibration. Recommended for Briggs LO206 and other 4-cycle setups. Racers keep these studs and nuts as spares in the trailer. Fully threaded studs offer flexibility during engine mounting.