Inconel head studs for BMW M47N M47 - NJ Performance

Description

BMW M47N  Inconel 699 Head Stud Kit – High-Boost Cylinder Head Fastening Solution

Premium Inconel 699 head stud kit for BMW M47N  Iron-block engines. Designed for extreme cylinder pressures, high boost levels, and demanding performance applications.

Unlike factory torque-to-yield head bolts, these custom-manufactured Inconel studs provide significantly more consistent clamping force. They help prevent head lift, reduce fastener stretch, and maintain head gasket sealing under extreme combustion pressures.

For engines running more than 3 bars of boost pressure, upgraded head fastening becomes essential. This kit delivers the clamping stability required for high-performance street, drag racing, and motorsport builds.

The studs feature precision rolled threads and undergo a custom aging process to maximize tensile and yield strength while minimizing the risk of stress concentrations and micro-fractures.

Kit Contents

• 10 custom Inconel 699 head studs
• 10 Inconel washers
• 10 Inconel nuts (multi-point 20  )
• Assembly / torque lubricant

Features

• Manufactured from Custom Inconel 699 alloy
• Precision rolled threads for maximum strength
• Custom aged heat treatment process
• Maintains consistent cylinder head clamping force
• Prevent head lift in high-boost applications
• Direct replacement for factory head bolts
• Suitable for performance and motorsport engines

Technical Specifications

• Yield Strength: 200,000 PSI
• Tensile Strength: 230,000 PSI
• Stud Length: 166 mm

Compatibility

Compatible with BMW M47N   iron-block engines, including:

• BMW 320d – 150 hp
• BMW 520d – 150 hp
• Other M47N2 and M47 iron block variants

Installation

The kit includes mounting instructions and torque recommendations to ensure proper installation and maximum clamping performance.

Shipping

Inside Europe price includes DHL Standart ground delivery (4-6 working days).
Outside Europe contact us for a shipping quote and details .

For additional BMW M57 performance parts and engine upgrades, please visit our M57 engine section.