ARP 8740 Chromoly Head Stud Kit - Toyota 1.6L (2TC) & 1.8L (3TC) | 12-Point Nuts

The ARP 203-4206 head stud kit is listed for Toyota 1.6L (2TC) & 1.8L (3TC). The fasteners secure the cylinder head to the block; their application, installed length and preload must work with the chosen head and gasket arrangement.

Technical Highlights

• Manufacturer part number: 203-4206
• Application/configuration: Toyota 1.6L (2TC) & 1.8L (3TC)
• Specified configuration: 12-Point
• Material: 8740 chrome moly

8740 chrome moly is a heat-treatable alloy steel used for strength and fatigue resistance in engine fasteners. Correct preload and joint preparation remain essential to the assembled connection.

Selection Guidance

Fastener preload supplies the clamping force at the head-to-block joint. Gasket sealing also depends on suitable deck finish, component condition and the correct assembly procedure.

Match the engine and any specified aftermarket cylinder heads or block to the listed configuration. Do not assume that related engines use the same fastener dimensions. Pay particular attention to the stated 12-Point configuration.

Installation Considerations

Check block threads, fastener engagement and cylinder-head clearance during trial assembly. Follow the instructions for this exact part number, including lubricant locations, washer orientation and tightening sequence. Washer seating and lubrication requirements vary by kit.

Vehicle Fitment