If your Outlet Manifold does not have a JR logo cast into the top, you have the old design. The new JR Outlet Manifold has been redesigned to provide better airflow and overall aesthetics. Additionally, a lip has been cast into outlet to provide better grip and keep the crossover tube from blowing off. A is 1990-1997, and 1999-2000 is B. For B, can be used on 90-97 for even better flow. On 90-97 some modification to the hood support bracing will be required.
** Sorry this item is no longer available through Jackson Racing **