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

The HEDMAN Weld-On Collectors 1-7/8in x 3-1/2in (Pair) are heavy-duty exhaust manifold collectors designed for custom engine builders and serious performance enthusiasts who demand professional-grade exhaust flow optimization. These weld-on style collectors serve as the critical transition point between individual cylinder runners and the main exhaust system, making them essential for any engine swap, turbocharger conversion, or high-horsepower build.

Constructed for durability and precision fit, the 1-7/8-inch primary tube diameter accommodates mid-range to high-rpm power bands while the 3-1/2-inch outlet provides proper step-up sizing for smooth gas velocity transition into your secondary piping or turbo inlet. The weld-on design allows fabricators complete freedom in header and exhaust routing, eliminating the constraints of bolt-on systems and enabling custom-fit installations on engine bays with tight clearances.

Professional fabricators, engine builders, and performance shops will benefit from the robust wall thickness and construction quality of these collectors. The pair configuration allows symmetrical exhaust flow for dual-plane and traditional V-engine layouts, making them an ideal choice for those looking to enhance engine performance and efficiency.