We recommend replacing the studs and nuts when changing exhaust manifolds or headers.
Our exclusive kits include:
• (9) M10 × 1.25 × 48mm long studs (choose Grade 8.8 gold Zinc plated Steel or ARP Stainless Steel)
• (9) M10 × 1.25 Copper-plated Steel flanged non-serrated crimped lock nuts
• (1) M10 × 1.25 tap to chase threads in head before replacing studs with new ones
• (1) tube of anti-seize
• ARP studs kit includes an Allen key for the broached-end studs
Also see Mazda exhaust manifold gaskets.