When a high-performance engine is producing more heat and operating under greater thermal loads, the cooling system needs to be engineered with the same level of attention as the engine itself. Coolant expansion, system pressure, air separation, and reliable coolant circulation all become increasingly important in demanding street, track, and motorsport applications.

Nuke Performance offers a range of cooling-system components designed around these requirements, including lightweight aluminum coolant expansion tanks, precision-calibrated Type-A radiator caps, and a weld-on radiator filler neck for custom cooling-system fabrication.

The five products featured here cover different aspects of a performance cooling system, from compact expansion tanks to custom radiator fabrication.

Nuke Performance 0.8L Performance Coolant Expansion Tank

The Nuke Performance 0.8L Performance Coolant Expansion Tank is designed for applications where advanced coolant deaeration and controlled coolant flow are priorities.

Unlike a conventional overflow reservoir, this expansion tank is designed to operate as an integrated part of a pressurized cooling system. Its dual-chamber construction incorporates an oversized Vortex chamber that uses rotational coolant flow to help separate air from the coolant.

Incoming coolant enters through an AN-6 ORB inlet, while two AN-10 ORB outlets provide flexible plumbing options for the main coolant return, air bleeding, or auxiliary coolant circulation.

The billet aluminum construction keeps weight under control while providing the durability required for high-temperature motorsport environments. A 32mm radiator neck allows the tank to use standard Type-A mini radiator caps, while the included aluminum mounting bracket simplifies integration into a custom cooling system.

The 0.8L Performance tank also includes a provision for coolant-level monitoring and an O-ring-sealed body designed for reliable operation in a pressurized system.

Key Features

• 0.8-liter capacity
• Dual-chamber internal design
• Oversized Vortex chamber for enhanced deaeration
• Lightweight billet aluminum construction
• AN-6 ORB coolant inlet
• Dual AN-10 ORB coolant outlets
• 32mm Type-A radiator cap neck
• 1/16 NPT overflow port
• 1/16 NPT to 6mm barb adapter included
• Coolant-level reading provision
• Aluminum mounting bracket included
• Designed and developed in Sweden
• Designed for pressurized cooling systems
• Intended for motorsports use only

The 0.8L Performance model is particularly suited to custom motorsport cooling systems where air separation and controlled coolant flow are important considerations.

Product Link: https://x-ph.com/nuke-performance-coolant-expansion-tank-0-8l-performance-450-01-201/ 

Nuke Performance 1.0L Coolant Expansion Tank

For applications requiring a simpler expansion tank design, the Nuke Performance 1.0L Coolant Expansion Tank provides a straightforward single-chamber configuration with a 1.0-liter capacity.

The tank uses a side-mounted AN-8 ORB inlet designed to introduce coolant with a controlled swirling motion. This helps promote consistent circulation and natural air separation within the tank.

A bottom-mounted AN-10 ORB outlet provides the primary coolant return connection, while the 32mm radiator neck accepts standard Type-A mini radiator caps.

The lightweight aluminum construction and integrated mounting bracket make the 1.0L tank suitable for custom installations where available space, weight, and straightforward plumbing are important considerations.

This model is designed as part of a pressurized cooling system, rather than as a conventional overflow reservoir.

Key Features

• 1.0-liter capacity
• Lightweight aluminum construction
• Single-chamber design
• Controlled vortex inlet flow
• AN-8 ORB inlet
• AN-10 ORB outlet
• 32mm Type-A radiator cap connection
• 1/16 NPT overflow port
• 1/16 NPT to 6mm barb fitting included
• Integrated aluminum mounting bracket
• Designed for street and motorsport applications
• Designed and developed in Sweden
• Type-A radiator cap sold separately

The 1.0L version offers a practical solution for performance builds that need a compact, lightweight expansion tank without the additional internal complexity of the 0.8L Performance model.

Product Link: https://x-ph.com/nuke-performance-coolant-expansion-tank-1-0l-455-01-201/ 

Nuke Performance 1.5L Coolant Expansion Tank

The Nuke Performance 1.5L Coolant Expansion Tank follows the same single-chamber concept while increasing capacity to 1.5 liters.

Its side-mounted AN-8 ORB inlet introduces coolant into the tank with controlled vortex flow, while the bottom-mounted AN-10 ORB outlet provides the primary coolant connection.

The additional capacity makes the 1.5L version suitable for cooling systems that require greater expansion volume while still benefiting from a compact aluminum construction.

Like the 1.0L model, the 1.5L tank uses a 32mm Type-A radiator cap connection and is intended to function as an integrated component of a pressurized cooling system.

Key Features

• 1.5-liter capacity
• Lightweight aluminum construction
• Single-chamber design
• Controlled vortex inlet flow
• AN-8 ORB inlet
• AN-10 ORB outlet
• 32mm Type-A radiator cap connection
• 1/16 NPT overflow port
• 1/16 NPT to 6mm barb fitting included
• Integrated aluminum mounting bracket
• Designed for pressurized cooling systems
• Suitable for demanding street and motorsport applications
• Designed and developed in Sweden

The 1.5L expansion tank is a practical choice when a performance cooling system calls for additional expansion capacity without moving to a larger or more complicated reservoir design.

Product Link: https://x-ph.com/nuke-performance-coolant-expansion-tank-1-5l-455-01-202/ 

Nuke Performance Type-A Radiator Caps

The Nuke Performance Type-A "Mini" Radiator Caps are designed for cooling systems using a 32mm Type-A radiator neck.

Available in four pressure ratings, these radiator caps allow builders to select a pressure rating appropriate for their specific cooling-system requirements.

Available options include:

• 1.1 BAR (16.0 PSI) — Part #452-01-011
• 1.3 BAR (18.9 PSI) — Part #452-01-013
• 1.5 BAR (21.8 PSI) — Part #452-01-015
• 2.0 BAR (29.0 PSI) — Part #452-01-020

Increasing cooling-system pressure raises the boiling point of the coolant, providing additional boiling margin during high-load operation. However, higher pressure also increases stress on cooling-system components, so the highest available rating should not automatically be considered the best option.

Nuke Performance recommends selecting the lowest pressure cap that provides sufficient boiling margin for the specific application.

The caps feature stainless-steel valve and cap construction with silicone sealing material designed for durability under repeated exposure to heat and pressure.

Key Features

• Designed for 32mm Type-A radiator necks
• Available in 1.1, 1.3, 1.5, and 2.0 BAR ratings
• Stainless-steel valve and cap construction
• Silicone sealing material
• Precision-calibrated pressure control
• Compatible with Nuke Performance coolant expansion tanks
• Suitable for OEM and custom cooling systems
• Applications across Japanese, European, and motorsport platforms
• Designed for street, track, and motorsport use

These radiator caps provide an important final component for expansion tanks and custom cooling systems using the Type-A 32mm standard.

Product Link: https://x-ph.com/nuke-performance-type-a-radiator-caps/ 

Nuke Performance 32mm Weld-On Radiator Filler Neck

For completely custom cooling-system installations, the Nuke Performance Weld-On Radiator Filler Neck 32mm provides a dedicated mounting point for Type-A radiator caps.

The aluminum filler neck is designed to be welded directly into compatible aluminum cooling-system components, making it suitable for custom radiators, expansion tanks, swirl pots, and coolant reservoirs.

Its precision-machined sealing surface provides the interface required for a reliable radiator-cap seal, while the 32mm configuration makes it compatible with Nuke Performance Type-A radiator caps.

The included 1/16 NPT to 6mm barb fitting provides an additional connection for applications requiring the supplied fitting.

Key Features

• 32mm Type-A radiator filler neck
• Weld-on installation
• Lightweight aluminum construction
• Precision-machined sealing surface
• Designed for custom cooling-system fabrication
• Suitable for custom radiators and expansion tanks
• Suitable for swirl pots and coolant reservoirs
• Compatible with Nuke Performance Type-A radiator caps
• 1/16 NPT barb fitting to 6mm hose included
• Radiator cap sold separately

The weld-on filler neck is particularly useful when building a custom cooling system from scratch or modifying an existing aluminum component to accept a standardized Type-A radiator cap.

Product Link: https://x-ph.com/nuke-performance-weld-on-radiator-filler-neck-32mm-for-type-a-radiator-caps-452-02-101/ 

Building a More Purpose-Driven Cooling System

These Nuke Performance components address different requirements within a performance cooling system.

The 0.8L Performance expansion tank focuses on advanced internal coolant flow and deaeration through its dual-chamber Vortex design. The 1.0L and 1.5L tanks offer simpler single-chamber solutions with different capacity options.

The Type-A radiator caps provide selectable system-pressure control, while the 32mm weld-on filler neck gives custom fabricators a way to integrate the same radiator-cap standard directly into an aluminum cooling component.

Together, they provide a flexible foundation for building or upgrading custom pressurized cooling systems for performance vehicles, track cars, and motorsport applications.

Important Application Information

These products are primarily performance and custom cooling-system components rather than vehicle-specific direct-fit replacements. Before purchasing, verify the required tank capacity, mounting location, available space, hose routing, fitting sizes, radiator neck configuration, and pressure requirements for the intended application.

The Type-A radiator caps are designed for 32mm Type-A radiator necks, and the appropriate pressure rating should be selected based on the complete cooling system rather than simply choosing the highest available pressure.

The Type-A radiator caps are sold separately from the coolant expansion tanks and weld-on filler neck.

Note: Product-specific motorsport-use restrictions and manufacturer requirements should be observed before installation.