REDOX Silicone Intake Hose K04 Turbo Audi S3 to A4 B6 1.8T 20V - Complete Conversion Kit

Silicone Intake Hose for K04 Turbo Conversion Audi A4 B6 1.8T

This REDOX silicone air intake hose enables the installation of a K04 turbocharger from Audi S3 8L 1.8T onto your Audi A4 B6 1.8T 20V. Specifically designed for this conversion sought after by engine tuning enthusiasts, it ensures a perfect connection between your K04 turbo and the intake system.

Technical Specifications

Manufactured from premium VMQ silicone with 5mm wall thickness and 4-ply construction, this hose offers exceptional resistance to extreme temperatures from -50°C to +180°C. The multi-layer structure guarantees optimal pressure retention against the demands of a more powerful K04 turbo compared to the stock K03.

Unlike stock rubber hoses that expand, crack and eventually burst under the increased pressure of the K04, VMQ silicone maintains its shape and mechanical properties over time. This dimensional stability prevents pressure losses that reduce performance and protects your engine against the risk of debris ingestion.

Verified Applications and Compatibilities

This hose is suitable for adapting a K04-023, K04-022 or K04-020 turbocharger from Audi S3 8L 1.8T (AMK, BAM engines) onto Audi A4 B6 1.8T 20V. This conversion is popular because the K04 turbo offers significantly higher power potential than the stock K03, allowing approximately 247 horsepower to be achieved with adapted mapping and a performance exhaust system.

Compatible vehicles as receiving base:

• Audi A4 B6 1.8T 20V (2001-2005)
• Engines AVJ, BFB, BEX

This conversion also requires ECU remapping, suitable injectors and ideally a front-mounted intercooler to fully exploit the potential of the K04 turbo.

Permanent Stock and Express Delivery

REDOX maintains permanent stock of this hose in French warehouses. Orders placed before 5pm are shipped the same day by GLS courier with delivery within 24 to 48 hours in mainland France and Europe. No more endless waiting: your turbo conversion project can progress without delay.

Main Features

• High-quality VMQ silicone, resistant -50°C to +180°C
• 5mm wall thickness, reinforced 4-ply construction
• Stainless steel clamps included in kit
• Available in three colours: Black, Blue, Red
• Lifetime warranty on hose (REDOX manufacturer warranty)
• Compatible with high-performance petrol engines

The kit includes all necessary clamps for plug-and-play installation. The stainless steel clamps ensure uniform and durable clamping, eliminating the risk of air leaks that would compromise K04 turbo performance.

Frequently Asked Questions (FAQ)

Is this hose compatible with all K04 turbos?

This hose is specifically designed for adapting a K04 turbo from Audi S3 8L (references K04-023, K04-022, K04-020) onto an Audi A4 B6 1.8T. It is not suitable for other K04 variants such as the K04-064 from 2.0 TFSI engines.

Do I need to change other parts to install a K04 turbo on my A4 B6?

Installing a K04 turbo requires several modifications: high-capacity injectors, specific K04 ECU remapping, high-performance intercooler recommended, and ideally a less restrictive exhaust system. The hose alone is not sufficient for a complete conversion.

What does the lifetime warranty cover?

The REDOX lifetime warranty covers manufacturing defects and material failures of the silicone under normal usage conditions. It does not cover damage caused by excessive tightening, incorrect installation, or use outside temperature and pressure specifications.

Can I install this hose myself?

Installation requires advanced mechanical skills as it is part of a complete turbo conversion. It is strongly recommended to entrust this operation to a specialized VAG tuner who can also perform the essential engine mapping.

What power can I achieve with a K04 turbo on A4 B6?

With a K04 turbo, suitable injectors, a good intercooler and optimized mapping, you can target approximately 240 to 260 horsepower on 98-octane petrol. More advanced preparations with K04 hybrid turbo can reach 300 to 330 horsepower.

Are the supplied clamps of sufficient quality?

The supplied stainless steel clamps are specifically sized for the diameters of this hose and offer professional quality. They ensure uniform clamping without silicone deformation and resist corrosion.

Can I use this hose in competition?

Absolutely. REDOX VMQ silicone is designed to withstand the constraints of motorsport: high temperatures, high pressures, vibrations and repeated stress. Many racing teams trust REDOX hoses.

What is the difference from a standard rubber hose?

Standard rubber expands under pressure and temperature, causing boost losses. It ages quickly, becomes brittle and eventually cracks. VMQ silicone maintains its mechanical properties over time, does not deform and resists thermal and chemical attacks much better.