Upgrade the exhaust system on a compatible Audi A4 or Volkswagen Passat 1.8T turbocharged application with this XS-POWER high-flow performance downpipe.

Designed for compatible 1997-2005 Audi A4 B5 / B6 and 1998-2005 Volkswagen Passat 1.8T applications, this performance downpipe uses large-diameter 3.00-inch exhaust piping to provide a higher-flow exhaust path downstream of the turbocharger.

Construction features polished T304 stainless steel, CNC machine mandrel-bent tubing and TIG-welded joints for a performance-oriented turbo exhaust upgrade.

The downpipe incorporates two O2 sensor insertion points and is supplied with a metal gasket as specified with this kit.

This downpipe is intended specifically for compatible turbocharged 1.8L / 1.8T inline-four DOHC engine applications in the Audi A4 and Volkswagen Passat platforms listed below.

Vehicle model alone should not be used to determine compatibility. Confirm engine, turbocharger connection and exhaust configuration before ordering.

• XS-POWER high-flow turbo downpipe
• Designed for compatible Audi A4 and VW Passat 1.8T applications
• 3.00" performance exhaust piping
• Specified inlet / outlet sizing: 2.50" / 3.00"
• High-quality T304 stainless steel construction
• Polished stainless steel finish
• CNC machine mandrel-bent tubing
• TIG-welded construction
• Two O2 sensor insertion points
• Metal gasket included
• Designed to increase exhaust-flow capacity
• Designed to reduce restriction downstream of the turbocharger
• Performance-oriented replacement for compatible turbo exhaust applications

The downpipe uses 3.00-inch exhaust piping to provide increased exhaust-flow capacity for compatible Audi and Volkswagen 1.8T turbocharged applications.

The supplied specifications identify an inlet / outlet size of 2.50" / 3.00" with a primary piping diameter of 3.00 inches.

Larger-diameter performance exhaust components are commonly used as part of modified 1.8T turbo systems where reducing unnecessary exhaust restriction is a priority.

The XS-POWER 1.8T downpipe is manufactured from T304 stainless steel and finished with a polished exterior.

The tubing is mandrel bent to maintain a smooth exhaust path through the bends, while the assembly uses TIG-welded joints.

This construction is designed for the elevated temperatures and operating conditions found in turbocharged performance exhaust applications.

The downpipe is one of the first major exhaust sections after the turbocharger. Exhaust leaving the turbine must pass through this section before continuing into the remainder of the exhaust system.

A larger, higher-flow downpipe can reduce unnecessary exhaust restriction compared with a more restrictive exhaust configuration, supporting improved exhaust flow from the turbocharger.

Actual vehicle response depends on turbocharger configuration, ECU calibration, exhaust system, engine condition and supporting modifications.

The supplied product specification identifies dyno-tested performance improvements and reports gains of up to approximately 10-15 horsepower / torque in applicable configurations.

The downpipe incorporates two O2 sensor insertion points as specified for the product.

Sensor configuration, ECU calibration and emissions-monitoring requirements can vary by model year, engine code and market. Verify the vehicle's original configuration before installation.

This performance downpipe is designed around the longitudinal turbocharged 1.8T Audi / Volkswagen platform represented by the compatible Audi A4 and Volkswagen Passat applications listed above.

It should not be assumed to fit transverse-engine Volkswagen 1.8T applications such as Golf, GTI or Jetta simply because those vehicles may also use a 1.8T engine. Downpipe routing and turbo/exhaust configuration are application-specific.

• 1 x XS-POWER Audi / VW 1.8T Performance Downpipe
• 1 x Metal Gasket

Only components specifically listed above should be considered included.

• Professional installation is recommended.
• Confirm vehicle, engine and turbocharger configuration before ordering.
• Compare the original downpipe and connection points with product photographs.
• Verify O2 sensor configuration before installation.
• Modified or aftermarket exhaust systems may require adjustment or fabrication.
• Check all connections for proper clearance and sealing after installation.
• Recheck exhaust connections after initial heat cycles.

Performance downpipes can alter the factory exhaust and emissions-control configuration. Depending on the vehicle and installation, diagnostic trouble codes or a check-engine light may occur.

ECU calibration or other vehicle-specific modifications may be required for certain performance exhaust configurations.

Emissions and road-use regulations vary by jurisdiction. The purchaser and installer are responsible for determining whether this product is legal for the intended vehicle and application.

What vehicles is this downpipe designed for?
The supplied application information identifies compatible 1997-2005 Audi A4 B5/B6 and 1998-2005 Volkswagen Passat vehicles equipped with applicable turbocharged 1.8L / 1.8T engines.

What diameter is the downpipe?
The supplied specification identifies 3.00-inch piping with listed inlet / outlet sizing of 2.50" / 3.00".

What material is the downpipe?
T304 polished stainless steel.

Is the tubing mandrel bent?
Yes. The supplied specification identifies CNC machine mandrel-bent tubing.

How many O2 sensor ports are provided?
The downpipe is specified with two O2 sensor insertion points.

Is a gasket included?
Yes. A metal gasket is included according to the supplied package specification.

Will this fit an Audi A4 1.8T?
Compatible A4 1.8T applications are included in the supplied fitment range. Verify the exact engine, turbo and exhaust configuration before ordering.

Will this fit a VW Passat 1.8T?
Compatible 1998-2005 Passat 1.8T applications are included in the supplied fitment information. Verify the vehicle configuration before ordering.

Will this fit a Golf, GTI or Jetta 1.8T?
This listing is not identified for those transverse-engine applications. A 1.8T engine designation alone does not guarantee downpipe compatibility.

Does a performance downpipe increase horsepower?
The supplied product information reports performance improvements and gains of up to approximately 10-15 horsepower / torque in applicable testing. Actual results vary significantly by vehicle configuration and are not guaranteed.