This is a 1/4 scale functional supercharger to suit the conley v8 engine generation 1-4 and our range of v8s. For the gen 4 you will require a manifold and also need to drill 4 holes. Email for more details. Includes: - polished supercharger - adjustable belt tension - polished pulleys - twin perry carburetors - chrome bug catcher with red or yellow flaps - your choice - adaptor plate - belt - screws (qs-supercharger)