Weld-On Collectors 1-7/8in x 3-1/2in (Pair)

The HEDMAN Weld-On Collectors 1-7/8in x 3-1/2in pair delivers premium exhaust manifold performance for serious engine builders and hot rod enthusiasts. These weld-on collector units feature dual 1-7/8-inch primary tubes that converge into a 3-1/2-inch outlet, engineered to maximize exhaust scavenging and support increased horsepower in modified small-block and mid-displacement engines. At 10 inches in length, this pair provides the compact footprint needed for tight engine bay installations while maintaining the flow characteristics critical to performance builds.

Each collector in this pair is constructed from quality steel in natural finish, ready for ceramic coating, polishing, or integration into a complete exhaust system. The weld-on design allows full customization of primary tube routing and manifold angle, essential for fitting headers in engine swaps, race applications, and vintage restorations where off-the-shelf solutions fall short. The 1-7/8-inch primary diameter is the industry standard for small-block applications, balancing back pressure and flow across the RPM range. The 3-1/2-inch outlet diameter accommodates modern 3.5-inch or stepped exhaust piping, allowing seamless transition to mufflers, turbo manifolds, or collector tanks.

This pair is ideal for builders fabricating custom manifolds, street rod shops fitting new powerplants into classic frames, and performance enthusiasts optimizing intake-to-exhaust flow paths. HEDMAN collectors are trusted for consistent wall thickness and weld integrity, supporting both naturally aspirated and boost applications when paired with appropriate downstream components. Whether you're building a street machine, vintage racer, or engine swap project, these weld-on units provide the foundation for a tuned exhaust system tailored to your specific engine configuration and performance goals.