Flashark 3" Catless Downpipe for 1999–2004 VW MK4 Golf, Jetta & New Beetle 1.8T

A: This downpipe is designed for 1999–2004 Volkswagen Golf, Jetta and New Beetle models equipped with the 1.8T turbocharged gasoline engine. Fitment is determined by the engine, turbo flange and exhaust configuration—not only by the model year.

A: No. This product fits the 1.8T turbocharged gasoline engine only. It does not fit naturally aspirated 1.8L engines or Volkswagen 1.9L TDI, 2.0L and VR6 engines.

A: No. Audi A4 models use a different longitudinal engine layout and exhaust routing. This downpipe is designed for compatible transverse-engine Volkswagen Golf, Jetta and New Beetle applications listed in the fitment table.

A: Yes. This is a two-piece catless downpipe that may replace or alter the factory catalytic-converter section. It is not legal for use on pollution-controlled vehicles on public roads in the United States. Installation and use must comply with all applicable laws.

A: A check engine light may occur because removing the factory catalytic converter can change the readings detected by the downstream O2 sensor. The exact result depends on the vehicle, ECU calibration and existing modifications.

A: The vehicle may operate without an immediate ECU calibration, but a compatible performance calibration may be required to optimize a motorsport setup. A tune does not make an emissions-modifying product legal for street use.

A: It is designed for the compatible factory-style 1.8T turbo flange. It may not fit upgraded or big-turbo systems that use a different turbine outlet flange. Compare the flange pattern with your existing turbo before ordering.

A: The downpipe uses a 2-inch exhaust-side outlet. Compatibility depends on the connection diameter and configuration of your existing exhaust. Modified or aftermarket exhaust systems may require an adapter or professional fabrication.

A: Welding is generally not expected when the product is installed on a confirmed-compatible vehicle with the correct factory-style connections. However, previously modified exhaust systems may require an adapter, clamp or professional fabrication.

A: The downpipe includes built-in O2 sensor bungs. O2 sensors are not included; compatible existing sensors must be transferred during installation.

A: The package includes:

• 1 × Upper downpipe section with flex joint


• 1 × Lower downpipe section


• 2 × Exhaust gaskets


• 7 × Bolts


• 7 × Nuts


• 7 × Washers

O2 sensors and installation tools are not included.

A: No specific horsepower increase is guaranteed. Results vary according to vehicle condition, ECU calibration, turbocharger, intake, intercooler and the rest of the exhaust system. The primary purpose is to reduce exhaust restriction and support a performance-oriented setup.

A: Yes. Professional installation is recommended because older exhaust fasteners may be seized or corroded, and the turbo flange, O2 sensors and exhaust connections must be properly aligned to prevent leaks or vibration.