Exhaust Manifold Set GM LS w/2.5in Outlet

The Exhaust Manifold Set GM LS w/2.5in Outlet from HOOKER is designed for serious marine engine builders looking to enhance the performance of LS-series powerplants in boats and watercraft. This manifold set is ideal for those upgrading contemporary LS engines in classic hulls or optimizing existing marine platforms.

Manufactured from cast iron and finished in natural (unpainted) cast, this two-piece manifold set is engineered to withstand the thermal cycling and salt-air exposure common in marine environments. The 2.5-inch outlet diameter is optimized for exhaust velocity while controlling backpressure, which is crucial for engine cooling and durability in marine applications.

This manifold set is specifically built for GM LS-series engines, including LS1, LS2, LS3, and related platforms often swapped into marine applications. Weighing 30.55 pounds and measuring 12 x 9.3 x 20.6 inches, it fits standard marine mounting locations and is designed to promote smooth gas flow paths, reducing turbulence and heat accumulation in confined engine compartments.