Tubes are heavy duty 16 gauge and 3/8 thick flanges. These headers will increase air flow for gains of 10-15hp. Includes collectors, gaskets, and bolts needed to install. The ultra strong tubular cross-member engine mount, combined with the easy-to-adjust slide adapter brackets makes installation of your LS engine easy. Tubular engine mount design offers increased header clearance and a more practical engine pad along with a sleek custom look.PLEASE CALL BEFORE ORDERING TO SPECIFY THE YEAR OF YOUR TRUCK. We will be glad to assist you any way we can. Our goal is to provide you with the best service possible. If, for some reason you do not feel you have received a "5 star" service, please contact a customer service representative. The item "47-54 55-59 Chevy Truck LS Engine Conversion Swap Kit Motor Mounts with Headers" is in sale since Wednesday, November 22, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Suspension & Steering\Coil Springs". The seller is "jlfab118" and is located in Harrisonburg, Virginia. This item can be shipped worldwide.