XS-POWER K04-001XLC E05 50MM Turbo – VW MK4 Golf GTI Jetta Beetle Audi TT 1.8T

 XS-POWER K04-001XLC • HUGE E05 50MM COMPRESSOR • 1.8T TURBO UPGRADE • FAST-SPOOLING K04 PERFORMANCE 

STOP REPLACING YOUR K03 WITH ANOTHER BASIC K03.

Step up to the XS-POWER K04-001XLC upgraded turbocharger, built for performance-minded Volkswagen and Audi 1.8T enthusiasts who want significantly more turbo than an ordinary stock-style replacement.

At the heart of the K04-001XLC is our huge E05-style 50MM upgraded compressor, giving this compact K04-based turbocharger substantially more airflow potential while retaining the responsive characteristics that make the K04-001 platform so popular on the transverse VW/Audi 1.8T.

Designed for compatible VW MK4 Golf / GTI, Jetta / GLI, New Beetle and Audi TT Mk1 1.8T applications, the K04-001XLC is for the enthusiast who wants a serious street turbo without jumping straight into a large-frame turbo conversion.

 K04-001XLC – NOT YOUR ORDINARY K04

There are ordinary replacement turbos — and then there is the XS-POWER K04-001XLC.

This upgraded model uses a massive 50MM E05-style compressor configuration to move considerably more air than the little factory-style K03 units normally associated with many MK4 1.8T applications.

The idea is simple:

MORE COMPRESSOR.
MORE AIRFLOW POTENTIAL.
SERIOUS 1.8T PERFORMANCE.
WITHOUT GIVING UP THE COMPACT K04-001 PACKAGE.

 GT28RS-STYLE TERRITORY IN A SMALLER PACKAGE

Think of the XS-POWER K04-001XLC as a serious K04 hybrid positioned below a full-size GT28RS-style turbo conversion.

The goal is to combine the quick-response characteristics of a compact turbocharger with substantially greater compressor capability than a basic K03 replacement.

For a properly prepared 1.8T with the correct tune and supporting modifications, this gives enthusiasts a very attractive balance between:

• Fast turbo response
• Strong street drivability
• Increased airflow capability
• More top-end potential than a basic K03
• Compact K04-001-style installation
• Excellent performance potential for modified 1.8T builds

⚡ HUGE E05 50MM COMPRESSOR

The compressor is what separates this turbo from the ordinary replacement crowd.

The XS-POWER K04-001XLC uses an upgraded E05-style 50MM compressor configuration designed for enthusiasts who want substantially more airflow than a stock-style K03 replacement.

Don't judge a performance turbo simply by looking at the number of compressor blades. Wheel diameter, compressor geometry, turbine matching, engine calibration, fuel quality, intercooling and the rest of the combination all matter.

SIZE + DESIGN + TURBINE MATCH + TUNING = THE COMPLETE TURBO SYSTEM.

 PERFECT FOR THE VW / AUDI TRANSVERSE 1.8T PLATFORM

The Volkswagen/Audi 1.8T 20-valve turbo engine became one of the most modified European four-cylinder turbo platforms of its generation for good reason.

The transverse 1.8T found in vehicles such as the MK4 Golf GTI, MK4 Jetta, New Beetle and Audi TT responds extremely well to the right combination of turbocharger, software, fueling, intake, intercooling and exhaust upgrades.

The K04-001XLC was created for enthusiasts who have outgrown the basic K03 and want to move into a much more serious performance configuration.

PRIMARY VEHICLE APPLICATIONS

• Volkswagen Golf MK4 1.8T
• Volkswagen Golf GTI MK4 1.8T
• Volkswagen Jetta MK4 1.8T
• Volkswagen Jetta GLI MK4 1.8T
• Volkswagen New Beetle 1.8T
• Audi TT Mk1 / 8N 1.8T 180HP compatible applications
• Other compatible transverse VW / Audi 1.8T K03 / K04-001 applications

COMMON YEAR RANGE REFERENCE:

• 1999–2005 Volkswagen New Beetle 1.8T applications
• 2000–2005 Volkswagen Golf / GTI MK4 1.8T applications
• 2000–2005 Volkswagen Jetta / GLI MK4 1.8T applications
• 2000–2006 Audi TT Mk1 / Typ 8N 1.8T compatible applications

⚠️ IMPORTANT: Fitment is determined by the engine, original turbocharger configuration, compressor inlet, turbine outlet and related hardware — not model year alone. Always compare your original turbo and engine code with the listing photographs and specifications before ordering.

 COMMON 1.8T ENGINE CODE REFERENCE

K04-001-style upgrades are commonly associated with transverse VW/Audi 1.8T engine families including:

AWD • AWW • AWP • AGU • ARZ • AUM • AJQ • APP • ARY • AUQ

Engine-code availability varies by vehicle and market. The engine-code list is provided as an application reference and should not replace physical turbo comparison.

 IMPORTANT AUDI TT 225HP NOTICE

THIS IS NOT A DIRECT REPLACEMENT FOR THE AUDI TT 225HP K04-022 / K04-023 TURBO SYSTEM.

The higher-output TT 225 uses a different K04 turbo configuration. Do not purchase this turbo simply because your vehicle is an Audi TT 1.8T. Verify the original turbo configuration and engine code first.

 LARGER COMPRESSOR INLET – READ BEFORE ORDERING

Because the K04-001XLC uses an enlarged performance compressor configuration, some applications may require a larger turbo inlet pipe / TIP.

For example, certain Audi TT 180HP and other 1.8T applications originally equipped with a smaller K03-style compressor inlet may require an upgraded inlet hose to accommodate the larger turbo inlet.

THE TURBO INLET PIPE IS NOT INCLUDED WITH THIS LISTING.

DON'T GET STUCK WITH A BASIC K03 REPLACEMENT

If you're already replacing the turbocharger on a modified 1.8T, ask yourself what you actually want from the car.

If all you want is factory-style performance, a stock replacement may be enough.

But if you're already planning software, intercooling, exhaust, fueling and additional performance modifications, why install another small basic replacement turbo?

THE XS-POWER K04-001XLC WAS BUILT FOR THE GUY WHO WANTS MORE.

⚙️ PERFORMANCE SUPPORTING MODIFICATIONS

Turbocharger performance depends on the complete vehicle combination. For maximum performance potential, a modified K04-001XLC installation may require supporting upgrades such as:

• ECU software / custom turbo calibration
• Properly sized fuel injectors
• Appropriate fuel-system upgrades
• High-flow turbo inlet pipe
• Upgraded intercooler
• High-flow downpipe and exhaust
• Proper diverter valve
• Correct spark plugs and ignition components
• Proper boost-control configuration

The exact requirements depend on the engine code, desired boost level, fuel, vehicle configuration and ECU calibration.

⚙️ XS-POWER K04-001 XLC SPECIFICATIONS

WHAT'S INCLUDED

• 1 × XS-POWER K04-001XLC Turbocharger
• Turbo installation gaskets
• STUDS

Turbo inlet pipe is NOT included. Other hoses, oil lines, coolant lines, injectors, software and supporting components are not included unless specifically shown or stated.

❓ K04-001XLC 1.8T TURBO FAQ

What is the XS-POWER K04-001XLC?

The K04-001XLC is an upgraded K04-001-style performance turbocharger featuring a large 50MM E05-style compressor configuration for compatible transverse VW/Audi 1.8T applications.

Will the K04-001XLC fit a VW MK4 Golf GTI 1.8T?

It is designed for compatible transverse MK4 Golf / GTI 1.8T K03/K04-001-style applications. Engine code and original turbo configuration must be verified before ordering.

Will this fit a VW MK4 Jetta or GLI 1.8T?

Compatible MK4 Jetta / GLI 1.8T applications are among the primary uses for the K04-001 platform. Always verify the existing turbo configuration before purchase.

Will this fit a VW New Beetle 1.8T?

It is designed for compatible transverse New Beetle 1.8T turbo applications. Verify your engine code, original turbo and inlet configuration.

Will this fit an Audi TT 1.8T?

It is intended for compatible Audi TT Mk1 / 8N 180HP-style applications. It is NOT a direct replacement for the TT 225HP K04-022 / K04-023 configuration.

Do I need a larger turbo inlet pipe?

Some applications may require a larger inlet pipe because of the upgraded compressor inlet. The turbo inlet pipe is not included.

Do I need ECU tuning?

Proper ECU calibration is strongly recommended when taking advantage of the increased airflow capability of an upgraded turbocharger. Fueling and other supporting modifications must be matched to the desired performance level.

Is this just a stock K04-001 replacement?

No. The K04-001XLC is marketed as an upgraded performance version using a substantially larger 50MM E05-style compressor configuration.

XS-POWER VW / AUDI TURBO PERFORMANCE

XS-POWER supplies performance hardware for Volkswagen and Audi enthusiasts worldwide, including K03 and K04 turbochargers, turbo inlet pipes, diverter valves, intercoolers, downpipes, exhaust systems, turbo manifolds and silicone performance hoses.

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