Proflow LS Exhaust Headers, Tight-Fit 1-5/8'' Block Huggers, Chevrolet Holden LS1 LS2 Rear Outlet, Stainless Steel, Set - PFEEH7003Part Number: PFEEH7003 Proflow's block hugger headers will help you to save space in tight engine bays while giving you the performance that you need. Featuring clean corner welds and precision cut flanges to reduce warping under extreme temperatures. They promote higher exhaust flow rates than standard headers and come with all necessary bolts and gaskets. Note: Please check clearance prior to purchasing.