4-1 Merge Collector 1.5 in Inlet ID 2.5in Out OD

The 4-1 Merge Collector 1.5 in Inlet ID 2.5 in Out OD from Vibrant Performance is a specialized exhaust manifold component designed for performance enthusiasts and engine builders. This collector is ideal for consolidating four individual cylinder runners into a single outlet, making it particularly suitable for four-cylinder engines and custom turbo applications.

Engineered with precision mandrel bends and optimized port geometry, the 4-1 merge collector minimizes turbulence at the junction where the four 1.5-inch inlet runners meet the 2.5-inch outlet. This design reduces backpressure spikes and promotes smooth gas scavenging, which is essential for maintaining exhaust velocity and preventing reversion.

This merge collector is best suited for custom turbo builds and performance exhaust systems, ensuring durability under high-temperature operation. Its stepped design allows for controlled flow acceleration, making it a reliable choice for applications where exhaust system performance is critical.