5.3 6.0 LQ9 LS1 LS6 LS2 LS3 Header Exhaust Manifold Bolts, BLACK Use With 5.3 6.0 LQ9 LS1 LS6 LS2 LS3 Header Exhaust Manifold Black Oxide Coated Bolts Set Includes 12 Header / Exhaust Manifold Grade 12.9 Bolts & 12 Lock Washers Bolts have Allen Socket Head Corrosion Resistant Bolts