Merge Collector 2-1/2in Primaries 5in Outlet

The Merge Collector 2-1/2in Primaries 5in Outlet is an essential component for high-performance exhaust systems, particularly in custom header builds. It is designed for automotive builders who focus on large-displacement racing engines or high-boost forced induction setups, where optimizing gas velocity and scavenging is crucial.

This collector features a 4-into-1 design that allows four individual 2.5-inch primary tubes to converge into a high-volume 5-inch outlet. Constructed from durable stainless steel with a natural finish, it is built to withstand extreme thermal cycles and corrosive environments typical in competitive racing. The internal merge geometry minimizes turbulence, ensuring smooth transitions of exhaust pulses and reducing backpressure.

Professional fabricators and performance enthusiasts will find this collector beneficial for maintaining engine efficiency across the power band. Its slip-on attachment style allows for easier assembly and disassembly, making it ideal for maintenance or tuning adjustments in tight engine bays. Each unit is engineered with precise tolerances to ensure a secure fit with the primary tubes, maintaining the structural integrity of the custom exhaust manifold.