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The Alloy Shed

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Premium hand-built aluminium tanks and pressure components for performance applications. Designed and TIG-welded in the UK 🇬🇧| info@thealloyshed.com

Our Product Range:

Header Tanks

Designed to help eliminate air pockets and maintain stable coolant pressure, contributing to improved cooling efficiency and engine protection.

  • Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Vertical) Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Vertical)

    Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Vertical)

    Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Vertical)

    Regular price £140.00 GBP
    Regular price Sale price £140.00 GBP
  • Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Horizontal) Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Horizontal)

    Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Horizontal)

    Aluminium Header Tank 1.5L – Pressurised Coolant Reservoir (Horizontal)

    Regular price £140.00 GBP
    Regular price Sale price £140.00 GBP
  • Subaru WRX / STI Aluminium Header Tank | Coolant Reservoir (02–07 WRX, 04–14 STI) Subaru WRX / STI Aluminium Header Tank | Coolant Reservoir (02–07 WRX, 04–14 STI)

    Subaru WRX / STI Aluminium Header Tank | Coolant Reservoir (02–07 WRX, 04–14 STI)

    Subaru WRX / STI Aluminium Header Tank | Coolant Reservoir (02–07 WRX, 04–14 STI)

    Regular price £130.00 GBP
    Regular price Sale price £130.00 GBP
  • 2L+ High Capacity Aluminium Header Tank Motorsport Expansion Tank 2L+ High Capacity Aluminium Header Tank Motorsport Expansion Tank

    2L+ High Capacity Aluminium Header Tank Motorsport Expansion Tank

    2L+ High Capacity Aluminium Header Tank Motorsport Expansion Tank

    Regular price £160.00 GBP
    Regular price Sale price £160.00 GBP
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Coolant Swirl Pots

Aluminium coolant swirl pots designed to improve air separation, aid bleeding, and stabilise cooling systems in motorsport and performance applications.

  • Aluminium Coolant Swirl Pot | Motorsport Fabricated | 0.9L

    Aluminium Coolant Swirl Pot | Motorsport Fabricated | 0.9L

    Aluminium Coolant Swirl Pot | Motorsport Fabricated | 0.9L

    Regular price £140.00 GBP
    Regular price Sale price £140.00 GBP

Fuel Swirl Pots


Crafted by Hand, designed to prevent fuel starvation under hard cornering and maintain consistent fuel delivery on track or road.

  • Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L AN-Fitting

    Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L AN-Fitting

    Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L AN-Fitting

    Regular price £145.00 GBP
    Regular price Sale price £145.00 GBP
  • Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L

    Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L

    Aluminium Fuel Swirl Pot | Motorsport Fabricated | 1.5L

    Regular price £130.00 GBP
    Regular price Sale price £130.00 GBP

Oil Management

Hand-built, Designed to separate oil vapour and blow-by gases, keeping your intake system clean and efficient.

  • Oil-Air Separator (-10 / -12 AN) Baffled

    Oil-Air Separator (-10 / -12 AN) Baffled

    Oil-Air Separator (-10 / -12 AN) Baffled

    Regular price £145.00 GBP
    Regular price Sale price £145.00 GBP
  • Aluminium Oil Catch Can | Motorsport Fabricated | 1.5L

    Aluminium Oil Catch Can | Motorsport Fabricated | 1.5L

    Aluminium Oil Catch Can | Motorsport Fabricated | 1.5L

    Regular price £120.00 GBP
    Regular price Sale price £120.00 GBP

Fuel Tanks


Hand-built aluminium fuel tanks for motorsport and custom builds. TIG-welded in the UK.

  • Aluminium Fuel Tank | Motorsport Fabricated | 5L Capacity

    Aluminium Fuel Tank | Motorsport Fabricated | 5L Capacity

    Aluminium Fuel Tank | Motorsport Fabricated | 5L Capacity

    Regular price £170.00 GBP
    Regular price Sale price £170.00 GBP

Power Steering Reservoirs

TIG-welded aluminium power steering reservoir— built for reliability, clean look, and precise steering performance.

  • Aluminium Power Steering Reservoir | Motorsport Fabricated

    Aluminium Power Steering Reservoir | Motorsport Fabricated

    Aluminium Power Steering Reservoir | Motorsport Fabricated

    Regular price £110.00 GBP
    Regular price Sale price £110.00 GBP

The Alloy Shed Journal

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  • Cooling System Pressure Caps Explained

    Cooling System Pressure Caps Explained

    January 6, 2026

    Pressure caps are a small but critical part of any cooling system. This article explains how radiator and header tank caps work, why pressure matters, and how to choose the...

    Cooling System Pressure Caps Explained

    January 6, 2026

    Pressure caps are a small but critical part of any cooling system. This article explains how radiator and header tank caps work, why pressure matters, and how to choose the...

  • Swirl Pot Sizing: Why Capacity Matters Less Than You Think

    Swirl Pot Sizing: Why Capacity Matters Less Tha...

    January 6, 2026

    Swirl pots are often chosen by capacity alone, but volume is rarely what makes them effective. Height, outlet position, and system layout play a far greater role in how well...

    Swirl Pot Sizing: Why Capacity Matters Less Tha...

    January 6, 2026

    Swirl pots are often chosen by capacity alone, but volume is rarely what makes them effective. Height, outlet position, and system layout play a far greater role in how well...

  • Coolant Swirl Pot vs Header Tank – What’s the Difference and Which Do You Need?

    Coolant Swirl Pot vs Header Tank – What’s the D...

    January 4, 2026

    Coolant swirl pots and header tanks are often confused, but they serve different purposes. A swirl pot is designed to actively remove air from the cooling system, improving stability and...

    Coolant Swirl Pot vs Header Tank – What’s the D...

    January 4, 2026

    Coolant swirl pots and header tanks are often confused, but they serve different purposes. A swirl pot is designed to actively remove air from the cooling system, improving stability and...

1 / of 3
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The Alloy Shed

Hand-built aluminium parts, welded with pride in the UK.

Made for performance, reliability, and a clean engine bay finish.

📧 Email: info@thealloyshed.com

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