3in Collector to 3in Exh Collector

The 3in Collector to 3in Exhaust Collector from Hedman is a precision-engineered transition fitting designed for custom exhaust system builders and performance engine swap applications. This reducer serves as the critical link between primary exhaust manifold collectors and your main exhaust piping, enabling seamless diameter transitions while maintaining backpressure integrity. Whether you're installing headers on a carbureted street engine, transitioning between mismatched collector sizes during a powertrain swap, or building a complete custom exhaust from the ground up, this collector reducer eliminates flow disruptions that would otherwise create turbulence and power loss.

Constructed from mandrel-bent steel with a natural finish, the 3in Collector to 3in Exhaust Collector features a 3-bolt flange inlet connection that securely mounts to standard header collector flanges, while the outlet provides smooth 3-inch OD tubing compatibility. The solid steel construction resists thermal cracking and vibration fatigue—critical for high-heat exhaust environments where cheaper welded reducers fail prematurely. Gaskets are included to ensure leak-free sealing at the flange interface, eliminating the need for additional purchases and reducing installation time. The compact footprint (5.9 x 4.3 x 7 inches) fits tight engine bays without requiring frame modifications, and the 2.88-pound weight adds minimal unsprung mass.

This component is essential for engine builders, exhaust fabricators, and performance enthusiasts tackling header installations on street rods, restorations, and late-model swaps. The pair configuration ensures you have matching units for dual-runner applications, simplifying installation across symmetrical exhaust layouts. Use this reducer when transitioning from multi-tube primary collectors to single-pipe secondary piping, or when header outlet sizing doesn't align with your exhaust tubing diameter. Installation requires basic wrench work and high-temperature gasket material knowledge; proper torque on the 3-bolt flange prevents header leaks that compromise dyno numbers and customer satisfaction.