REDOX Silicone Turbo Hose for Audi A4 B6 1.8T 20V 163hp - Boost Pipe

High-Performance Silicone Turbo Hose for Audi A4 B6 1.8T

This REDOX silicone boost hose replaces the original rubber hose on your Audi A4 B6 equipped with the 1.8T 20-valve engine producing 163 horsepower. Designed for the boost system between the turbocharger and air-to-air intercooler, it represents a major upgrade in reliability and durability.

Technical Specifications

The hose is manufactured from premium VMQ silicone with 5mm wall thickness and 4-ply reinforced structure. This multi-layer construction provides exceptional resistance to mechanical and thermal stresses. It easily withstands extreme temperatures ranging from -50°C to +180°C (-58°F to +356°F), far exceeding the demands of the original boost system.

VMQ silicone (polydimethylsiloxane) offers consistent elasticity over time, unlike natural rubber which hardens, cracks and eventually bursts under repeated thermal cycles. The 4-ply textile reinforcement ensures perfect pressure retention without deformation or ballooning.

Applications and Vehicle Compatibility

This hose is specifically suitable for the following models:

• Audi A4 B6 (type 8E) from 2002 to 2005 equipped with 1.8T 20V petrol engine producing 163hp
• Compatible engine codes: AMB (primary for European market), AVJ, BFB
• Body styles: Sedan, Avant (wagon), Quattro and front-wheel drive

The 1.8T AMB engine powered the Audi A4 B6 from 2002 to 2005, succeeding the AWM code used in 2001. It's an inline 4-cylinder turbocharged engine with 1781cc displacement, variable valve timing, K03 turbocharger and air-to-air intercooler.

OEM Reference Numbers

This REDOX hose replaces the following manufacturer references depending on exact position on your vehicle:

• 06B133356AH (turbo inlet hose 20mm)
• 06B133356AG (turbo inlet hose 25mm)
• 058133785B (breather hose to turbo inlet)

We recommend checking the reference printed on your original hose before ordering to confirm exact compatibility.

Why Replace Original Hoses

Original Audi hoses are manufactured from EPDM natural rubber, an economical material suitable for mass production but with significant long-term limitations. Under the combined effects of engine bay heat, turbo pressure cycles and natural aging, these hoses undergo progressive degradation: hardening, surface cracking then sudden failure.

A punctured or burst boost hose causes immediate loss of boost pressure, resulting in drastic engine performance drop, limp mode activation and potentially dust ingestion damaging the turbocharger. Preventive replacement with a REDOX silicone hose permanently eliminates this risk.

Permanent Stock and Express Delivery Benefits

REDOX maintains permanent stock of this hose in our French warehouse. Your order is prepared and shipped same-day for all orders placed before 5pm on working days. Delivery is handled by GLS with delivery within 24 to 48 hours throughout mainland France and most European countries.

This immediate availability allows you to respond quickly in case of original hose failure or carefully plan your boost system upgrade during engine preparation.

Main Features

• Material: High-performance VMQ silicone
• Structure: 4-ply reinforced
• Wall thickness: 5mm
• Temperature range: -50°C to +180°C (-58°F to +356°F)
• Available colors: Blue, Black, Red
• Warranty: Lifetime against manufacturing defects
• Fitment: Stock location, no modifications required
• Clamps: Not included (reuse original clamps or upgrade to stainless steel)

Installation and Fitting

Installation is performed in place of the original hose without vehicle modification. No specialized tools required. Simply loosen the original clamps, remove the old hose, clean the connection fittings, install the new REDOX silicone hose and tighten clamps to recommended torque (3-4 Nm).

For optimal sealing and maximum longevity, we recommend using stainless steel worm-drive hose clamps such as Serflex or Norma type. Original spring clamps can be reused but offer lower long-term reliability.

Frequently Asked Questions (FAQ)

What's the difference between blue, black and red colors? All three colors are strictly identical in terms of chemical composition, mechanical and thermal resistance. The choice is purely aesthetic. Blue and red are popular in motorsport preparation for their visibility in the engine bay, while black offers a more discreet appearance closer to original.

Will this hose fit if I've upgraded my stock turbo? Yes, this hose fits perfectly with K04 turbo upgrades or equivalent, as long as you maintain the stock boost system location. For big turbo installations with complete system repositioning, custom hoses will be required.

Should all boost system hoses be changed at once? While not mandatory, it's highly recommended to replace all boost system hoses during an intervention. This ensures uniform reliability and avoids having to disassemble the system again a few months later to replace another failing hose.

Are hose clamps included? No, clamps are not included. You can reuse your original clamps or order high-quality stainless steel clamps for optimal installation. The 5mm wall thickness of the REDOX hose ensures excellent sealing even with original clamps.

Is this hose compatible with my Audi A4 B6 diesel? No, this hose is specifically designed for 1.8T 20V petrol engines. Diesel versions (1.9 TDI, 2.0 TDI) use hoses with different dimensions and distinct OEM references.

What's the actual delivery time? For mainland France, expect 24 to 48 hours after dispatch. Dispatch occurs same-day for all orders confirmed before 5pm on working days. For other European countries, delivery time is generally 2 to 4 working days depending on destination.

Does lifetime warranty cover normal wear? REDOX lifetime warranty covers all manufacturing, material or design defects. It does not cover damage caused by incorrect installation, excessive clamp tightening, use outside specifications or external mechanical damage.

Can I fit this hose on an Audi A4 B5 or B7? For Audi A4 B5 1.8T (1997-2001), dimensions may vary depending on year and engine code (AEB, ATW, AWM). For Audi A4 B7 1.8T (2005-2008), this hose is compatible if your vehicle retains the same AMB engine. Always check your original hose reference before ordering.