4-1 Merge Collector 1.625in Inlet ID 2.25in

The 4-1 Merge Collector 1.625in Inlet ID 2.25in from VIBRANT PERFORMANCE is a high-flow exhaust header designed for engine builders and performance enthusiasts seeking maximum scavenging efficiency and power gains. This merge collector consolidates four individual primary tubes into a single outlet, optimizing exhaust gas velocity and reducing backpressure across the RPM band.

Built for both street and track applications, it serves as a critical step in any serious exhaust system upgrade, whether tuning a naturally aspirated engine or preparing a forced-induction platform for boost. The collector features a 1.625-inch inlet diameter and a 2.25-inch outlet diameter, providing optimized flow characteristics that prevent turbulent mixing and maintain energy through the transition.

This collector is ideal for engine swaps, stroker builds, and high-revving naturally aspirated engines where header performance directly influences cylinder filling and exhaust evacuation. VIBRANT PERFORMANCE engineers this component using mandrel-bent construction and premium materials to withstand sustained high-temperature exhaust flow without warping or cracking.