Long tube headers I ordered for my 2008 Chevy Silverado 1500. I changed my mind your on using before I received them. I haven’t taken them out to the box. Just opened to inspect it & take the picture Longtube Exhaust Headers For Chevy Silverado Suburban Tahoe GMC Sierra Yukon 07-14 4.8L/5.3L/6.0L/6.2L You Receive in this Auction: Two Exhaust Headers with Gaskets. Item is 100% New, Never used or installed. Header features 8-2 piping design Outlet Size: 3.00" Primary Tube Size: 1.75" Head Flange Thickness: 7/16" Outlet Flange Thickness: 3/8" CNC machine flanges with TIG and MIG welded construction 3 Stage polish finish. Product does not come with installation instructions, please refer to a shop/factory manual for installation. Fit for : For Cadillac Escalade 2007-14 6.2L For Chevy Silverado 1500/2500/3(contact info removed)-2013 4.8L, 5.3L, 6.0L For Chevy Suburban 1500/2(contact info removed)-2014 5.3L, 6.0L For Chevy Tahoe 2007-2014 4.8L, 5.3L For GMC Sierra 1(contact info removed)-2013 4.8L, 5.3L, 6.0L, 6.2L For GMC Yukon 2007- 2014 4.8L, 5.3L, 6.0L, 6.2L