Genuine Honda Cylinder Head Bolts OEM 90006-PG6-003 – Civic, CRX, B16, D16 (11x155)

Genuine Honda Cylinder Head Bolts OEM 90006-PG6-003 – 11x155 mm

This set of Genuine Honda OEM cylinder head bolts (part number 90006-PG6-003) features a precision-engineered 11x155 mm specification. These bolts are specifically designed for high-performance B-series and D-series DOHC engines. As a Genuine Honda product, they provide the exact elasticity and clamping force required to maintain a perfect cylinder head gasket seal under extreme conditions.

In high-revving Honda engines, head bolts operate within a specific plastic deformation range (torque-to-yield). Using brand-new, original bolts during every head reinstallation prevents bolt failure and ensures uniform pressure across the engine block and head, which is vital for the reliability of VTEC systems.

Engine Applications

These bolts are compatible with the following engine codes:

• B-Series: B16A1, B16A2
• D-Series (DOHC): D16A8, D16A9, D16Z5
• Other: ZC1

Vehicle Compatibility

• Honda Civic 3D (1988-1991): D16A9, B16A1 (i-VT) engines
• Honda Civic 4D (1992-2000): B16A2 (VTEC) engine
• Honda Civic Coupe (1999-2000): B16A2 engine
• Honda Civic CRX (1986-1987): ZC1 engine
• Honda Civic CRX (1988-1991): D16A8, D16A9, D16Z5, B16A1 engines
• Honda Civic CRX Del Sol (1992-1997): B16A2 (VTEC) engine
• Honda Concerto (1990-1993): D16A9 engine

Technical Specifications

• OEM Part Number: 90006-PG6-003
• Dimensions: 11 mm x 155 mm
• Manufacturer: Honda OEM (Genuine Parts)

Why Choose OEM Over Aftermarket?

Cylinder head bolts in B-series and DOHC D-series engines are subjected to massive thermal and mechanical stress. Original Honda bolts undergo rigorous quality control for tensile strength. Aftermarket alternatives often have different elongation characteristics, which can lead to premature head gasket failure or "lifting" under high boost or high-RPM loads.

FAQ – Frequently Asked Questions

Do I need to replace the head bolts every time the gasket is changed?
Yes. These bolts are designed to stretch permanently when tightened to the service manual's torque-plus-angle specifications. Reusing old bolts risks snapping them during installation or failing to provide enough clamping force.

Do these bolts fit the D16Z6 (SOHC) engine?
No. SOHC D-series engines (like D16Z6, D16Y8) require different bolt lengths and specifications. This set (90006-PG6-003) is exclusively for DOHC D-series and B-series VTEC units.