Exhaust Manifold Set GM LS Swap Cast SS

The HOOKER Exhaust Manifold Set GM LS Swap Cast Stainless Steel is a purpose-built header system engineered for LS-series engine swaps where reliable, high-flowing exhaust evacuation is critical. This stainless steel pair delivers the thermal and corrosion resistance demanded in marine and high-performance applications, with a 2.5-inch outlet designed to transition smoothly into downstream exhaust components. Cast construction provides structural integrity while the natural stainless finish resists salt air corrosion—essential for boats and coastal operations where standard steel manifolds fail prematurely.

The 2.5-inch outlet diameter is engineered to balance scavenging efficiency with back-pressure management across the LS engine's typical RPM range. Stainless steel construction stands up to repeated thermal cycling and the corrosive environment of saltwater spray that accelerates rust in standard cast iron or mild steel headers. The manifold set weighs 26.51 lbs, making it manageable for installation while maintaining the mass necessary for durability. This is genuine HOOKER engineering—a brand with decades of exhaust system credibility in performance and marine applications.

Buyers installing LS engines in boats, lake-duty trucks, or coastal vehicles benefit most from the stainless steel specification. Weekend anglers running inboard LS conversions and serious offshore operators both face the same corrosion challenge—standard manifolds pit and fail within seasons in salt spray. This set addresses that reality directly. LS swap installations in marine hulls, ski boats, and performance watercraft frequently spec stainless headers to avoid repeat replacement and maintain resale value.

LS-series swaps demand headers matched to block port spacing and exhaust volume. The HOOKER set is cast for LS architecture—not a generic header retrofitted to fit. Verify your specific LS variant (LS1, LS3, LS7, LQ4, etc.) during ordering to ensure proper fitment. Outlet diameter affects downstream component selection; the 2.5-inch sizing requires compatible mufflers, Y-pipes, or headers to avoid restriction or fitting mismatches that compromise scavenging.