Slip-On Merge Collector 2in-3-1/2in

The HEDMAN Slip-On Merge Collector 2in-3-1/2in is a performance exhaust manifold transition component designed for builders seeking efficient primary-to-secondary runner merging on modified engines. This merge collector bridges the gap between 2-inch primary tubes and a 3-1/2-inch outlet, making it essential for street machines, weekend warriors, and engine builders who demand superior scavenging and reduced backpressure.

Whether you're upgrading a naturally aspirated V8 or refining a forced-induction build, this collector addresses a critical junction point where exhaust flow quality directly impacts horsepower delivery and throttle response. HEDMAN engineered this slip-on design to optimize the merging process without welding complications—a game-changer for DIY installations and professional shops alike. The transition geometry from dual 2-inch runners to the 3-1/2-inch outlet minimizes turbulence and separation, preserving momentum through the merge zone and into the rest of your exhaust system.

Constructed for durability under sustained high-temperature cycling, this collector weighs just 4.1 lbs, keeping total exhaust system weight minimal while maintaining rigidity. The compact footprint (6.3 x 6.3 x 17 inches) allows integration into tight engine bay configurations without sacrificing clearance or requiring excessive fabrication work. Buyers benefit most when building custom exhaust systems for street performance, drag racing, or high-output engine combinations where efficiency is paramount.