The perfect headset upgrade for your Specialized mountain bike with an FSA Spec IS42/IS52 headset. This kit includes Cane Creek&';s renowned stainless steel Hellbender 70 bearings and a 110 series crown race with a dual lip seal. Keep your current Specialized headset cups and simply replace your existing bearings and crown race with the parts in this kit to exponentially increase the durability of the headset in your Specialized mountain bike. Includes: Hellbender 70 IS42 upper (FSA Spec - 45 x 45) bearing Hellbender 70 IS52 lower bearing 110 Crown Race, 40mm (w/ dual lip seal)