LS Turbo Headers LSX, LS1, LS2, LS3, LS6 (1 3/4" Primaries) Forward Facing Up Mandrel Bent Tubing, CNC Machined Flanges Race Version, 304 Polished Stainless Steel 1 3/4" Primaries, Standard Graphite Manifold Gaskets Universal Headers (LS Engines Only) Turbo Headers