Lock up head, bolt on basket. 100% more surface area. Features an all-new, redesigned billet aluminum lock-up pressure plate designed to fit under the stock primary cover. No need to change or modify your cover. Surface area is greatly increased and lever effort is kept to a minimum. Three different coil spring sets included to provide a wide variety of spring pressure options, allowing you to tune the clutch for stock to 200+ HP applications. Scorpion clutch basket and a steel inner hub is also included to complete the unit. Billet aluminum pressure plate. Adjustable pressure arms increase spring pressure as RPM increase. Can be run wet or dry. Smooth, precise shifting. Made in the USA.