Centerlock Wheel – Central Bolt – Porsche GT3 Cup 996/997.1

Description Cup Stub Axle Centerlock Central Axle Bolt. Made from High Strength Heat Treated Steel Alloy.   This is a wear item, and the threads will flow outward after continuous torquing.  Demon Speed recommends replacing these parts every 25 hours of run time.  The second and third pictures were taken of a used factory center bolt.  These threads should be symmetrical, but instead they are deformed 50% in the direction of the wheel nut.  Deformed threads not only are a risk of failure, but they do not provide the same clamp load at the same torque as a non-damaged part. See video below for out torque to clampload testing for new and used parts. Replaces factory part number 996.331.671.90 Fits: 996/997.1 Cup Cars with Centerlock Wheels   Sold Per Each.