This is a USED Steel header for a 4 cylinder motor. I don't know what it goes to.
US STOCK 4-1 4 Cylinder 304 SS Manifold Header Merge Collector 2.5" V-Band Vband
US 4-1 4 Cylinder Manifold Header Merge Collector Stainless Steel 2.5" ID V Band
US SHIP 4-1 4 Cylinder 2.5" V-Band Manifold Header Merge Collector 120mm Length
US 4-1 4 Cylinder Manifold Header Merge Collector Stainless Steel T25 T28 Flange
4-1 4 Cylinder Manifold Header Merge Collector Stainless Steel 2.5" V-Band Vband
US 4-1 4 Cylinder 304SS Manifold Header Merge Collector 2.5" V-Band 120mm Height