Mazdaspeed Miata 1.8L IHI VJ35 Exhaust Manifold & Turbo Stud Nut Kit

Designed to match the demands of the Mazdaspeed Miata 1.8L turbocharged engine, this stud and nut kit provides a durable upgrade for both the exhaust manifold and IHI VJ35 turbo. Studs are crafted from medium carbon S35C steel, heat-treated and phosphate-coated for improved strength and corrosion resistance. Each stud includes an inner hex for fast and accurate installation with a hex key. Copper-plated top-lock nuts are engineered to stay tight under heat cycles and turbo pressure — the locking design resists loosening from vibration, ensuring consistent sealing at all joints. 🔧 Key Features‣ Engineered for Mazdaspeed Miata 1.8L turbo with IHI VJ35‣ Covers both exhaust manifold and turbo mounting‣ Studs: S35C Class 8.8 phosphate-coated, heat-treated steel‣ Inner hex design for easy torque application during install‣ Nuts: Copper-plated, top-lock flange design to prevent backing out‣ Ideal for factory or upgraded turbo setups