Features 1Function: The exhaust manifold hardware kit is used to fasten turbo and manifolds under high heat and stressure working conditions. 2High Performance: Restore the best performance of the turbocharger, improve engine efficiency, play a fixed role, reduce jitter and reduce noise. 3Important Parameter: The thread size of this exhaust manifold stud bolt kit is M8, 8mm, precision machined to ensure accurate thread engagement. 4Direct Replacement: This exhaust manifold hardware kit matches the original hardware required to secure the exhaust manifold to the engine on cars. 5Fine Workmanship: Professional manufactured, exquisite workmanship with unique design, ensure stable performance and high reliability. Specification Item Type: M8 1.25 Threaded Turbo Studs Kit Material: Metal alloy Thread Size: Approx. 8mm/0.31in, M8 Package List 8 x Stud 8 x Nut