LS1 Camaro & Firebird Longtube Headers (1 3/4" Race Version) F-Body "Stainless" Mandrel Bent Tubing, CNC Machined Flanges Race Version with "NO" AIR/EGR Fittings, 304 Polished Stainless Steel 1 3/4" Primaries, Standard Graphite Manifold Gaskets 3" Collector Gains over 25rwhp