Total Performance Aluminum Crankshaft Damper Spacer "Sleeve" is designed for the 429 - 460 Ford engine. These are precision CNC machined 6061-T6 billet aluminum material that is Dark Gray Hard anodized If your old Sleeve is worn and is causing the seal to leak, you need one of these new, light weight sleeves to replace it. These are designed for internal balance engines ONLY! Some engines require a counterweight mounted on the sleeve(external balance).

PART NUMBER: 100-429