Custom AN4 PTFE Hoses

  • Free 100-Day Returns
  • Free UK Delivery
Length
Left Fitting

We machine our fittings from premium stainless steel that will never rust.

Choose a fitting to reveal available thread size and angle options below.

Right Fitting

We machine our fittings from premium stainless steel that will never rust.

Choose a fitting to reveal available thread size and angle options below.

Hose Type

Choose the protective wipe-clean PVC coating that will be bonded to the stainless steel braided hose. If you plan to run the hose near a direct heat source without using heatsleeve, we recommend opting for uncoated.

Detailed braided hose specifications can be found below.

Hose Length

Use the vertical lines on the diagram to calculate the length. Measure from seat to seat, except for banjo fittings, which are measured from the center of the banjo eye.

The length tolerance is ±5mm.

Notes optional

If you have any additional instructions or vehicle information to share, let us know here.

Label optional

Enter a label if you would like this line labelled in its own bag.

  • £31.49
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  • FREE UK DeliveryNext working day and worldwide delivery options also available.
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Delivery Options

We aim to dispatch orders the same day if ordered before 3pm (Monday to Friday, excluding bank holidays). Orders placed over the weekend will be sent on the Monday, unless it's a bank holiday.

For detailed delivery information, please visit our delivery page.

United Kingdom
Royal Mail 48 Tracked
FREE
2-3 Working Days
Royal Mail 24 Tracked
£5.99
1-2 Working Days
Royal Mail Special Delivery
£12.99
Next Working Day
Europe
Royal Mail Tracked
£14.99
5-7 Working Days
Rest of World
Royal Mail Tracked
£24.99
5-10 Working Days
100-Day Returns

We stand by the quality of our products, which is why we offer a generous 100-day return policy, even for custom-made items. This extended returns period gives you plenty of time to check the quality and performance of our products.

For full details, please visit our returns page.

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FAQ
  • Are your custom turbo lines covered by a warranty?

    Yes, our custom turbo lines include a 2-year warranty as standard. This warranty covers any defects in materials or workmanship.

  • Can I return or exchange my custom turbo lines?

    Yes, we offer a 100-day hassle-free returns policy for all our custom turbo feeds and returns. We know mistakes can happen and we want to make sure you are completely satisfied. However, please double-check your choices before ordering to avoid any silly mistakes, as it does cost us to replace them!

  • How do I measure the hose?

    The easiest way to measure your custom hose is with a piece of flexible wire or sturdy string. Make sure you go around all objects and follow all curves to make sure you don't measure the hose too tight, or the hose will be stretched when you fit it. You need to measure from the seats of male and female fittings and from the centre of the hole on banjo fittings. Refer to the two vertical lines on the hose builder diagram when building your hoses, as the length measurement will change depending on the chosen fitting.

  • Will these custom turbo lines work with my turbo?

    Yes, our custom turbo lines are designed to be compatible with all types of turbochargers, provided the fitting threads match your turbo's specifications. Some of the popular turbo brands we regularly supply lines for include: Garrett, BorgWarner, Precision, Owen Developments and many others. If you're unsure about compatibility, we recommend checking the thread sizes and specifications of your turbo or contacting our team for assistance.

  • Do you offer restricted turbo lines to combat turbo smoke issues?

    Yes, we can provide restricted turbo lines to help combat turbo smoke issues caused by excessive oil pressure. High oil pressure can sometimes lead to oil leakage through the turbo seals and into the exhaust, resulting in smoke. If you need to manage oil flow to reduce the risk of leaks, we recommend using a restricted banjo bolt or a restricted male to male adapter.

    It's worth noting that some turbochargers come with a built-in oil restrictor, so additional restriction may not always be necessary. If you're switching from a journal-bearing turbo to a ball-bearing turbo, keep in mind that ball-bearing turbos generally require less oil and a restriction may be required.

Specifications
AN4 PTFE Hose and Fittings Technical Specifications
Stainless Steel Braided
Maximum Operating Pressure 3000 PSI (206.8 BAR)
Burst Pressure 10000 PSI (689.5 BAR)
Minimum Bend Radius 32mm (1.3")
Outer Hose Material Stainless Steel Braided (coated in wipe-clean PVC, optional)
Inner Hose Material PTFE
Hose Bore Type Smooth Bore
Inner Diameter (ID) 6mm (1/4")
Outer Diameter (OD) 13mm (1/2")
Hose Size AN4 (-4 AN, Dash 4)
Fittings Material Stainless Steel (303/304)
Operating Temperature Range -70°C to 250°C (-94°F to 482°F)
Fluid Compatibility
  • Fuels: Petrol (E5, E10), Ethanol (E85), Methanol, Race Fuels, Diesel
  • Oils: Engine Oil, Hydraulic Oil
  • Gases: Air, Carbon Dioxide (CO2), Nitrous Oxide (N2O)
  • Fluids: Coolant, Water, Brake, Clutch
Common Applications Turbo Oil Feeds, Turbo Oil Returns, Turbo Water Feeds, Turbo Water Returns, Pedal Box Hoses
Hose Weight (Per Metre) 86g (0.19lbs)
Minimum Bend Radius

The minimum bend radius R  is used to determine the tightest curve the hose can make without getting damaged or blocking the flow inside.

Diagram explaining the minimum bend radius of a braided hose

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