The HPS Blue Silicone Breather+Bypass Valve Hose Kit For 03-06 TT Golf 1.8T AWP MK4 is in stock at PartSmith Co. and ready for dispatch from our USA warehouse.

Reinforcement ply count determines burst strength, which matters most on boosted applications. Measure inner diameter at the fitting rather than estimating by eye.
Every hps blue silicone breather order goes through the same fitment review.
Ordering the hps blue silicone breather takes a minute and the confirmation reaches you straight away.
Our team knows the hps blue silicone breather well, so ask if anything about the specification is unclear.
Stock of the hps blue silicone breather is live on this page rather than estimated.
Shops order the hps blue silicone breather from us in volume because the data on the page is accurate.
If your build is unusual, tell us and we will confirm the hps blue silicone breather against it.
The hps blue silicone breather ships protected, because a damaged part helps nobody.
At a glance
- Material: Silicone
- Finish: Blue
- Category: Hose Kits
- Price: $160.31 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
Unlike other breather hose kits on the market, 57-1934 features a specially developed fluoroelastomer layer that is able to withstand prolonged exposure to oil and fuel. HPS oil-resistant fluoroelastomer lined silicone hoses can provide superior resistance to the harshness of gasoline and automotive oils. The fluoroelastomer acts as a protective layer where the fluid flowing through the hose would typically degrade silicone hoses. With the fluoroelastomer liner, we can minimize permeation, evaporation, and degradation of our silicone hose.
HPS fluoroelastomer lined hose has excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics, and many organic solvents and chemicals. Fluoroelastomer can handle the occasional flow of ethanol based fuels.
- Material: 3-Ply Reinforced Silicone
- Color: Blue
- Ideal replacement or upgrade for OEM or aftermarket parts
Breather Hose, Valve Cover (OEM part# 06A103221AN)
Boost Pressure Control Line (OEM part# 06A145712C)
- The premium grade high-heat resistance 3-ply reinforced silicone hoses are made with correct bends and curves to ensure a perfect fitment.
- Prevent and fix the coolant leaking and engine over heating problem caused by cracked, damaged or collapsed OEM rubber hoses. Made with correct bends and curves for perfect fitment.
- Race proven design with long lasting quality and engineered for extremely high temperature service (Max. 350F) and prolonged exposure to under-hood and coolant heat.
- Includes 100% stainless steel industrial grade embossed hose clamps which would not cut through the silicone hose.
Application:
For 2003-2006 Audi TT 1.8T Turbo Late AWP Engine
For 2003-2006 Volkswagen Golf 1.8T Turbo Late AWP Engine (MK4)
For 2004-2005 Volkswagen Jetta 1.8T Turbo Late AWP Engine
Remark:
Installation: Silicone hose water permeation rate is 10 to 15 times greater than standard EPDM rubber hose. Checking water level regularly is highly recommended when silicone coolant hoses are used in a daily driving vehicle.
Product Content:
- 1 Set x Breather + bypass valve (BPV) Hose Kit
Hardware if Any is Shown in the Picture Above
The product does not come with manual/instruction, Professional Install Recommended
Cross Reference Number:
- 57-1934-BLUE, 571934BLUE, 06A103221AN, 06A145712C
A free fitment check takes minutes: send your year, make and model and we will confirm this is the correct part.
Related parts: Hoses & Fittings · HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 01-05 Mazda Miata 1.8L Non Turbo (NB2) · HPS Red Silicone Radiator Hose Kit For 99-01 Jeep Cherokee 4.0L (XJ) Right Hand Drive · full catalog
Finished surfaces are wrapped and hardware is bagged, so the part arrives ready to install.
When you want a second opinion that is not a parts store, read the Car Care Council maintenance tips.
Frequently asked questions
Can you check fitment before I order?
Trim level, engine option and drive type decide most fitment questions. Send those three details or the VIN and we will check them for you.
How quickly can I get this?
Your tracking link arrives by email at label creation and stays live until delivery, so you can follow the parcel the whole way.
How do returns work here?
If the part does not fit, message our support desk with the order number and we will arrange an exchange or refund. Keep the packaging until the test fit is done.
How do you verify this part?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
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