Vibrant Performance Turbo Manifold Merge Collectors are constructed from 304 Stainless Steel Schedule 10 pipe. Each component is precision 3D laser cut to create a tight fitment and assemblies are tack welded for ease of adjustability. Available in 4 into 1 and 6 into 1 configurations. Recommended Products: 1st Choice PN: 1441, 2nd Choice PN: 1442, 3rd Choice PN: 14350, Bend Degree2370, 5th Choice PN: 14901 Tack welded so a fabricator can easily make adjustments for their application