4 into 1 Turbo Manifold Merge Collector for T4 Divided Flange Description 4 into 1 Turbo Manifold Merge Collector for T4 Divided Flange Material T304 Stainless Steel Warranty One Year Limited Warranty Specifications -48mm Pipe OD-4.5 TallVibrant Merge Collectors make fabricating your Turbo Manifold much easier, less time consuming and more cost effective.