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

The Vibrant Performance 4-1 Merge Collector 2.5in Inlet ID 4in Out is a critical component for fabricators and racers looking to optimize exhaust gas scavenging in high-performance header builds. Designed for those seeking to maximize volumetric efficiency, this slip-on collector facilitates a smooth transition from four primary tubes into a single large-diameter exit. Whether building a custom turbo manifold or a naturally aspirated competition header, this component ensures that exhaust pulses are merged with minimal turbulence. It is an essential choice for professional builders who prioritize flow dynamics and engine breathability in demanding automotive applications.

Constructed from durable stainless steel with a natural finish, this merge collector features a precise 4-to-1 configuration that accepts 2.5-inch primary tubes. The 4-inch outlet diameter provides ample volume for high-flow requirements, reducing backpressure and improving overall power output across the RPM range. The slip-on design allows for thermal expansion and easier servicing of the exhaust system compared to fully welded rigid structures. By utilizing a refined internal geometry, this collector maintains high exhaust velocity to pull gases through the primary tubes more effectively.

This 10324 model is ideal for custom exhaust projects where precision fitment and long-term durability are non-negotiable for the end user. Because it is sold as a single unit, it allows for modular purchasing for V8 header pairs or single-bank inline engines requiring a large 4-inch exit. Fabricators should note that the 2.5-inch inlet inner diameter is designed to slide over primary tubing, making it compatible with a wide variety of custom header configurations. Professional installation via TIG welding is typically recommended to ensure leak-free performance and structural integrity under high heat cycles.