Porsche 718 Cayman & Boxster Inconel Performance Head Bolt Kit – High-Strength Upgrade for 2.0T Base & 2.5T S / GTS Models (2017–2024) | RaggDoll Motorsports

Porsche 718 Cayman & Boxster Inconel Head Bolt Kit – High-Strength Engine Hardware Upgrade - RaggDoll Motorsports

Maximum Clamping Force for High-Boost Porsche 718 Engines

The RaggDoll Motorsports Inconel Head Bolt Kit is a high-strength engine hardware upgrade for the Porsche 718 Cayman & Boxster, engineered to maintain proper cylinder head clamping under extreme boost, heat, and cylinder pressure. Designed for high-performance, high-boost, and built-engine applications, this kit replaces the factory head bolts with aerospace-grade Inconel fasteners for maximum reliability.

This is a critical supporting upgrade for serious Porsche 718 engine builds.

Why This Inconel Head Bolt Kit Exists

The factory Porsche 718 head bolts are sufficient for stock power levels, but they become a limiting factor as boost pressure, combustion pressure, and operating temperatures increase. Under high load, OEM bolts can stretch, lose clamping force, or allow head lift—leading to gasket failure or engine damage.

The RaggDoll Motorsports Inconel Head Bolt Kit was developed to eliminate this weak point by providing significantly higher tensile strength, superior heat resistance, and improved clamping stability. This ensures the cylinder head remains securely sealed even in extreme operating conditions.

Key Features & Benefits

• Aerospace-Grade Inconel Construction — Exceptional strength and heat resistance\
• Superior Clamping Force — Reduces the risk of head lift under high boost
• Improved Thermal Stability — Maintains torque integrity at elevated temperatures
• Designed for High-Boost Builds — Ideal for big-turbo and aggressive tuning setups
• Precision-Manufactured Hardware — Built for consistency, reliability, and long service life
  

Performance-Focused Engine Hardware

Maintains Head Gasket Integrity

High cylinder pressures place extreme stress on the head-to-block interface. Inconel fasteners resist stretching and fatigue far better than standard steel bolts, helping maintain consistent clamping force and protecting head gasket sealing surfaces.

Built for Extreme Heat & Load

Inconel alloys are commonly used in aerospace and motorsports due to their ability to retain strength at high temperatures. This makes them ideal for turbocharged Porsche 718 engines operating under sustained boost and track conditions.

Who This Is For

Ideal for Porsche 718 Cayman & Boxster owners building:

• High-boost turbo setups
• Big-turbo or hybrid turbo engines
• Forged internal engine builds
• Track-driven or endurance applications
• Long-term, high-power street cars

This upgrade is recommended whenever the engine is opened for internal work or when pushing beyond factory power limits.

Installation & Build Notes

Professional engine assembly is required.
Installation involves cylinder head removal and proper torque sequencing.

This kit should be installed in conjunction with:

• Forged internals (as applicable)
• Upgraded head gasket solutions
• Custom ECU tuning and supporting modifications

Always consult with RaggDoll Motorsports prior to installation to confirm build compatibility and power goals.

What’s Included

• Complete set of RaggDoll Motorsports Inconel Head Bolts
• Required washers and hardware (as applicable)

Vehicle Compatibility:

• Porsche 718 Cayman & Boxster (2017–2024)
• 2.0L & 2.5L turbocharged engines
  

Why Choose RaggDoll Motorsports

RaggDoll Motorsports develops performance solutions for the Porsche 718 platform with a focus on reliability at elevated power levels. We understand that engine strength is only as good as its weakest component—and fasteners matter.

Stronger clamping.
Higher reliability.
Built to handle boost.

Built differently — because performance demands it.