Exhaust Manifold Set GM LT Swap Rear Dump

The HOOKER Exhaust Manifold Set GM LT Swap Rear Dump is a cast iron exhaust solution designed for GM LT-series engine swaps requiring rear-exit exhaust configuration. This pair of manifolds features a 2.5-inch outlet diameter and natural cast iron finish, delivering reliable exhaust gas evacuation in high-performance marine and automotive swap applications where traditional front-exit systems are impractical or impossible to accommodate.

Cast iron construction provides thermal mass and durability essential for engine longevity, particularly in marine environments where exhaust systems experience sustained high temperatures and operational stress. The 2.5-inch outlet diameter maintains proper backpressure characteristics for the LT-series platform while accommodating standard marine exhaust piping transitions. As a pair, these manifolds ensure balanced primary tube sizing across both cylinder banks, critical for optimizing scavenging efficiency and preventing reversion issues common in swap installations.

This manifold set is engineered for engine builders and marine technicians performing GM LT swaps in space-constrained applications—particularly boat engine compartments, classic car restorations, and custom craft where centerline or side-exit routing is required. The rear-dump configuration eliminates the need for complex bending, routing, and fabrication work that front-exhaust systems demand, reducing labor costs and installation complexity significantly.

HOOKER manifolds are recognized in the performance and marine rebuild community for straightforward fitment and reliable cylinder-to-outlet flow patterns. Verification of your specific swap configuration—including engine bay clearance, water-cooling system placement, and exhaust outlet location—is essential before purchase, as rear-dump geometry requires dedicated outlet routing incompatible with standard front-facing headers.