3-1 Merge Collector ID 1.625in Inlet/2.5in Out

The 3-1 Merge Collector ID 1.625in Inlet/2.5in Out from VIBRANT PERFORMANCE is a precision exhaust manifold collector engineered for vehicles requiring multiple header runners consolidated into a single outlet. This component is essential for builders and technicians who need to merge three primary pipes into one secondary pipe while maintaining scavenging efficiency and minimizing backpressure. Designed for street, performance, and off-road applications, the 3-1 merge collector bridges the gap between custom header fabrication and bolt-on convenience, making it a trusted choice across motorsports, fabrication shops, and serious engine builders.

This collector features a 1.625-inch inlet diameter per primary runner and steps up to a 2.5-inch outlet, optimizing flow velocity and reducing turbulence as exhaust gases transition from three merged streams into the secondary pipe. The stepped design promotes scavenging—a critical factor in extracting maximum horsepower and throttle response. Constructed from high-temperature-rated materials capable of withstanding extreme heat cycles, the 3-1 merge design minimizes dead zones and promotes smooth, laminar flow characteristics. At 2.025 lbs and measuring 12.45 inches in length with a 6.65 x 6.55-inch footprint, it balances durability with installation accessibility in tight engine compartments. The precision casting and merging geometry ensure consistent runner velocity and prevent flow separation.

Fabricators, engine builders, and performance enthusiasts working with custom or modified powerplants rely on the 3-1 Merge Collector to finalize header systems where three separate primary tubes must consolidate into a single downpipe or secondary runner. This collector works seamlessly with custom flanges, turbo applications, and traditional exhaust systems, provided inlet and outlet diameters are matched to your build specifications. Professional installation ensures proper sealing and alignment; welding or bolting the collector requires precision to avoid exhaust leaks that compromise efficiency and performance. Whether you're building a street engine, preparing a competition platform, or upgrading an off-road platform, this VIBRANT PERFORMANCE collector delivers the engineering reliability and scavenging performance that separates quality builds from amateur work.