Vibrant 4-1 Merge Collector 2.50in Inlet I.D. Merge O.D. - 3.50in Outlet O.D. - 4.00in

If you're fabricating a custom exhaust system, getting the exhaust gases to merge smoothly is key to performance. This Vibrant 4-1 merge collector is designed to help you achieve that. It takes four individual exhaust inputs and merges them into a single, larger outlet, helping to improve exhaust scavenging and overall flow efficiency.

This collector is built from 16-gauge 304 stainless steel, which is a solid choice for exhaust components because it resists corrosion well. The seams are TIG welded with a back purge, a technique that helps ensure a strong, clean weld on the inside where it matters most for exhaust flow. It's ready to weld right out of the box, meaning you can get to work on your custom setup with minimal prep time.

The inlet side has a 2.50-inch inner diameter, and the outlet is a 4.00-inch outer diameter. This part is sold individually and is intended for custom fabrication projects.