Kooks BK101 Stage 8 Locking Exhaust Header Bolt Kit

M8*1.25 Studs Kit Exhaust Studs and Nuts Kit M8 studs replace W701706-S2 N811313S431, W707747S431, . A perfect replacement for Ford 1996-2017, for Lincoln 1998-2014, for Mercury 2001-2011 on 4.6 / 5.4/ 6.8 engines. Material: stainless steel Pitch of screw: 1.25MM(0.05IN) Nut Size: M8 x 50MM Rust prevention and corrosion protection Long service life [PACKAGE]16pcs exhaust studs and 16pcs serrated face flange nuts( with a high-quality plastic box）