Product details:

Lightweight Differential Case (N1904) by Strange. Lightweight aluminum cases are ideal for vehicles where unsprung weight is extremely critical, and gear life is not a major concern. Dimensionally very similar to the Pro Iron case, but uses high tensile aluminum alloy and forged aluminum main caps. Since the case is responsible for holding together the gear set and spool, the application should be carefully considered before a purchasing this case. Typical Drag Race applications are Super Comp Drag-sters, Altereds, and very lightweight cars. This case is not recommended for Street or Street/Strip. A Strange Engineering associate will be happy to assist you with your decision.