APE Main Bearing Studs – Hayabusa

These studs feature rolled threads, center-less ground surfaces, and come with competition-style twelve point flange nuts. As racing’s leading supplier of heavy-duty engine stud kits, APE already has their very popular top-end cylinder studs for most engines, and now turned their attention to the bottom end. By replacing the bottom end bolts with heavy-duty studs, it helps minimize the chances of high output engines trying to separate the engine cases at the crank centerline resulting in oil pressure loss and possible engine bearing failure.