Exhaust Shorty Headers for Chevy GMC 2008-2013 Silverado Sierra 1500 5.3L V8
GM Small Block Gen III/IV (LS Based) Engine. OE style ball socket collector connects to factory exhaust head pipe. Gains 18HP and 20 lb-ft torque. Mitered merge collectors to maximize exhaust velocity and scavenging. Excellent quality and durability to improve vehicle performance. Fully mandrel bent tubes made of high quality 16-gauge 304 Stainless Steel. Head flanges laser-cut from high quality 3/8-inch thick steel plates. The flange is flattened by a hydraulic press for precise and leak free sealing. All joints are golden color TIG brass style welded to prevent cracking and wear. Flanges chrome plated for corrosion resistance. Mandrel bent pipes to maintain free flow. The accessories in the photos are included. Header Type: Shorty / Short Tube. Primary Diameter: 1-3/4 in. Collector Diameter: 2-1/2 in. Head Flange Thickness:3/8 in. Pipe Thickness: 16 gauge (1.5mm). Material: 409 Stainless Steel. Note: The items you received are sho. Wn in the figure. If you have any questions later, please contact the after-sales staff in time.