We've had our FI-spec headers available for several years now. 2.5", 3" whatever you guys want for diameters. Built in-house using 100% TIG welding, backpurging, and a real merge collector. We recently redesigned the front header to improve ground clearance as well.
*This is a penetration weld, NOT welded inside.
*This is a penetration weld, NOT welded inside.