16-2603 D manifold OEM & S&S heads, size 408

This S&S size 408 manifold is a specialized intake solution for high-performance 1999 to 2005 Big Twin engines, specifically 117-inch Evolution and Twin Cam B configurations. It is designed for engines with a 4.888-inch cylinder length and features a pre-drilled hole for the MAP sensor, making it a modern choice for custom builds. Compatible with both OEM and S&S heads, this manifold is built for the Super D carburettor. It provides the heavy-duty construction and precise port matching required to feed a large-displacement motor without the risk of intake leaks or turbulence. This is a professional-grade component for those pushing the limits of the Twin Cam and Evo platforms.