4-1 S.S Merge Collectors 2in Inlet ID 3.5in Merge

The 4-1 S.S Merge Collectors 2in Inlet ID 3.5in Merge from Vibrant Performance is a stainless steel exhaust header designed to consolidate four individual runner tubes into a single merged outlet. This component is ideal for engine builders and performance enthusiasts who seek efficient scavenging and improved exhaust flow. It serves as a critical junction point where four separate cylinder banks combine into a unified exhaust path.

Constructed from high-grade stainless steel, the merge collector features a 2-inch inlet diameter that merges into a 3.5-inch outlet diameter for smooth transition into your primary exhaust piping or turbocharger inlet. This design minimizes turbulence and flow separation at the junction point, which is essential for maintaining velocity and preventing pressure waves that would otherwise choke cylinder evacuation. The 3.5-inch outlet diameter is optimized to handle four simultaneous exhaust pulses without restriction.

Weighing just 2.9 lbs, the lightweight stainless construction resists corrosion while contributing minimal weight penalty to your overall system. This is a critical factor for those tuning a custom engine, upgrading a street machine, or optimizing a competition build. The 4-1 merge collector plays a vital role in maximizing horsepower and torque delivery by reducing backpressure across the entire exhaust system.