Collector Outlet: 2.5" (INNER DIAMETER)

Suitable for K-Swap Headers with K20 K24 K-Series engines.

This K Swap 4-1 Megaphone Merge Collector with Reverse Cone & V-Band Flange is used on our popular K-Swap header, and offered as an option to convert our 4-2-1 or 4-1 header into drag style header with a Reverse Cone & V-Band Flange.

If your current header is a 4-2-1 or 4-1, this setup is the best for converting it a Reverse Cone & V-Band Flange.