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

The Merge Collector 2-1/2in Primaries 5in Outlet is a critical component for high-performance exhaust fabrication where optimizing gas velocity and scavenging is paramount. Designed for custom header builds, this 4-into-1 slip-on collector serves as the junction point where four individual 2.5-inch primary tubes converge into a high-volume 5-inch exit. Automotive builders often seek these specific dimensions when constructing large-displacement racing engines or high-boost forced induction setups that require massive flow capacity. Utilizing this collector ensures that exhaust pulses are transitioned smoothly, reducing backpressure and enhancing overall engine efficiency across the entire power band.

Constructed from durable stainless steel with a natural finish, this Stainless Works component is built to withstand the extreme thermal cycles and corrosive environments found in competitive racing. The 4-into-1 design features an internal merge geometry that minimizes turbulence as individual exhaust streams combine into the 5-inch outlet. The slip-on attachment style allows for easier assembly and disassembly of the header system, which is vital for maintenance or tuning adjustments in tight engine bays. Each unit is engineered with precise tolerances to ensure the 2.5-inch primary tubes fit securely, maintaining the structural integrity of the custom exhaust manifold.

Professional fabricators and performance enthusiasts looking to buy a reliable solution for custom exhaust projects will find this collector ideal for large-frame turbochargers or high-revving naturally aspirated builds. While the 5-inch outlet provides maximum volume for heavy-duty airflow, the merge technology ensures that scavenging remains efficient to help preserve low-end torque. It is recommended for use with TIG welding processes to maintain the high-quality stainless properties and ensure leak-free operation under high-pressure conditions. Reviewing your specific header layout and chassis clearance is essential, as the 11.55-inch length requires adequate space for proper installation and heat management.