The ARP 208-4306 cylinder head stud kit is designed for Honda B-Series hybrid engine applications using a B20B block with a B16A DOHC VTEC cylinder head. Manufactured from heat-treated 8740 chrome moly steel, ARP head studs provide increased clamping strength compared with typical factory head fasteners and are well suited for performance engine builds where increased cylinder pressure and engine speed place additional demands on the head gasket and cylinder head fasteners. ARP rates properly processed 8740 chrome moly in approximately the 180,000–210,000 psi tensile-strength range. Features ARP cylinder head stud kit Designed for Honda B20B block with B16A VTEC cylinder head Commonly used for B20/VTEC engine builds Premium 8740 chrome moly construction Heat-treated for high tensile strength 12-point head nuts Black oxide finish Designed for increased cylinder head clamping force Suitable for naturally aspirated and forced-induction performance builds Manufacturer Part Number: 208-4306 Engine Fitment Designed for: Honda B20B engine block B16A DOHC VTEC cylinder head B20/VTEC hybrid engine combinations using this block/head configuration This kit is commonly associated with B-Series VTEC conversion builds, but hybrid engine configurations can vary substantially. Verify your exact engine block and cylinder head combination before ordering. For stock non-VTEC B20 applications, a different ARP head stud kit is required. 8740 Chrome Moly Construction ARP manufactures these performance head studs from 8740 chrome moly steel. ARP describes 8740 as a tough alloy steel with good fatigue properties for racing applications when correctly heat-treated and thread-rolled after heat treatment. Depending on processing, ARP states that 8740 chrome moly can achieve tensile strengths of approximately 180,000 to 210,000 psi. Why Use Head Studs? Cylinder head sealing becomes increasingly important as compression ratio, boost pressure, cylinder pressure, and engine RPM increase. A properly installed head stud provides consistent clamping force between the cylinder head, head gasket, and engine block. This makes upgraded head hardware particularly useful in performance B-Series builds where factory hardware may be operating beyond its original design requirements. Recommended Use B20/VTEC, LS/VTEC w/B16a head engine builds Naturally aspirated performance engines Turbocharged B-Series builds Supercharged applications High-RPM B-Series engines Engine rebuilds Performance cylinder head installations Specifications Manufacturer: ARPPart Number: 208-4306Product Type: Cylinder Head Stud KitMaterial: 8740 Chrome MolyFinish: Black OxideNut Style: 12-PointPrimary Application: B20B Block with B16A Cylinder HeadEngine Family: Honda B-Series What's Included ARP cylinder head studs 12-point nuts Hardened washers Installation lubricant / components as supplied by ARP Installation Follow the installation instructions supplied with ARP kit 208-4306. ARP recommends using the specified assembly lubricant and tightening sequence to achieve proper fastener preload. For application-specific kits, always follow the torque specifications included with the kit rather than relying on ARP's general torque chart. Make sure the block threads are clean and that the cylinder head, head gasket, washers, nuts, and studs are installed according to the appropriate Honda and ARP procedures.
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