Now available ... a 9" gear case that replaces the stock (factory) gear case. Here is a completely re-engineered case built "beefed up" to handle up to 850 HP! The OEM case flexes under heavy loads and extreme conditions. This causes the ring and pinion to shift in relation to each other resulting in premature wear, binding and failure. The 9-Plus "Race Case" is over 100% stronger providing the sturdiest, most durable and reliable case on the market.