4-1 Merge Collector 2.5in Inlet ID 4.5 Out

The 4-1 Merge Collector 2.5in Inlet ID 4.5 Out by Vibrant Performance is a high-flow exhaust manifold solution designed for builders aiming for maximum scavenging efficiency and improved low-end torque response. This merge collector is crucial for the transition where four individual cylinder runners converge into a single outlet, making it ideal for both naturally aspirated and forced-induction engine builds.

With a 2.5-inch inlet ID and a 4.5-inch outlet diameter, the 4-1 Merge Collector utilizes stepped tube geometry to promote even flow distribution across all four runners. This design minimizes turbulence and enhances exhaust gas velocity, allowing for smooth transitions that prevent pressure waves from stalling flow or causing reversion. The construction is robust, ensuring durability under high-temperature exhaust duty.

This merge collector is beneficial for enthusiasts of both domestic and import four-cylinder vehicles, as well as turbo builders looking to optimize performance. Its compact dimensions make it suitable for installation in tight engine bays, ensuring that it meets the demands of street machines, track vehicles, and weekend warriors alike.