Don't let a flimsy tailhousing limit you! The Reid Racing 4L80e ROLLER BEARING Tailhousing is built for battle! Aircraft-grade aluminum, thicker walls, and gusseting make it stronger & more rigid than stock. Precision machining minimizes power loss & maximizes reliability. Our reworked oil passage improves lubrication for the yoke and rear bearing. . Fits stock & Super 80 cases. This roller bearing housing requires a hardened output yoke. The recommended yoke is Reid Racing P/N PGYMW-400R.