Chevy Silverado GMC Sierra Shorty Headers Truck 2007-2013 (4.8L, 5.3L, 6.0L, 6.2L Engines) Mandrel Bent Tubing, CNC Machined Flanges Race Version, 304 Polished Stainless Steel 1 5/8" Primaries/2 1/2" Collector, Standard Graphite Manifold Gaskets 2007-2013 (2wd & 4wd) Gains over 15rwhp