Stainless Steel LS Header Exhaust Manifold Bolt Kit. Compatible with All GM Chevy LS Series Engines LSX LS1 LS3 LS2 LQ4 LS6 LQ9 5.3L 6.0L 6.2L Hardened SS 304 (18-8) Bolts. Also Fits LSX LM7 LR4 LQ4 LQ9 L33 LH6 L92 L76 L99 L96 L82 L83 L84 L86 L87 Engines.