BLOX Racing intake and exhaust studs are CNC-machined from SUS303 stainless steel. Each stud features precision threads and includes a washer and 12-point hex nut. The stainless steel material provides excellent durability and protection from extreme heat, wear, and corrosion. BLOX Racing stainless steel intake and exhaust studs simply stop corrosion and rust out problems, prevent expensive cylinder repair costs caused by broken studs and allow easy removal of intake or exhaust manifolds for gasket replacement or inspection. Fastener Specs Thread Pitch: M10x1.25 Length: 55mm Material: SUS303 Stainless Steel Stud: 3mm Allen Socket Washer: 3mm Thickness Nut: 12-Point Hex Flange Nut Popular Applications Honda 1.5 Turbo, 2.0 Turbo* Acura/Honda K-Series Engines Toyota/Lexus 2.4, 2.7, 3.0, 3.4 (6pcs needed) Mitsubishi Evo Turbo Stud Subaru Turbo Stud *Cylinder head to turbocharger requires (4) studs *Turbocharger to downpipe requires (4) studs *Downpipe to frontpipe requires (3) studs B/D/F/H/J-Series: 45mm - Factory and Aftermarket Headers/Exhaust Manifolds B/D/F/H/J-Series: 55mm - Aftermarket Intake Manifolds & Intake Manifolds Using Thermal Gaskets B/D/F/H/J-Series: 65mm - Custom Applications Where Necessary Honda 1.5 Turbo, Honda 2.0 Turbo, Acura/Honda K-Series Engines, Mitsubishi Evo Turbo Stud, Subaru Turbo Stud: M10x1.25 55mm