Product Specifications
Flashark Catless Downpipe for Audi A4 & VW Passat 1.8T
Upgrade the turbo-exhaust section of your Audi A4 B5/B6 or Volkswagen Passat B5/B5.5 with the Flashark catless downpipe.
Designed specifically for confirmed vehicles equipped with the 1.8L turbocharged inline-four engine, this downpipe uses mandrel-bent stainless-steel tubing to provide a smoother, less restrictive exhaust path from the turbocharger.
The catless construction does not contain a catalytic converter. Two oxygen-sensor bungs are integrated into the pipe so the vehicle’s compatible oxygen sensors can be transferred where applicable.
Important: Oxygen sensors are not included. Because this product does not contain a catalytic converter, exhaust odor and sound may increase, and an emissions-related check-engine light may occur depending on the vehicle’s sensor system and calibration.
Key Features
- Designed for confirmed Audi A4 and VW Passat 1.8T applications
- Catless design with no catalytic converter inside the pipe
- Two integrated O2 sensor bungs
- Mandrel-bent tubing designed to support smoother exhaust flow
- TIG-welded joints for strength and durability
- CNC-machined connection flanges
- Polished stainless-steel construction
- Installation gaskets and hardware included as shown
Specifications
| Brand | Flashark |
| SKU | FLES08343 |
| Product Type | Catless Turbo Downpipe |
| Material | T-304 Stainless Steel |
| Surface Finish | Mirror Polished |
| Inlet Size | 2.5 Inches |
| Outlet Size | 3 Inches |
| O2 Sensor Ports | 2 Integrated O2 Sensor Bungs |
| Catalytic Converter | Not Included — Catless Design |
| Construction | Mandrel-Bent Tubing, TIG-Welded Joints and CNC-Machined Flanges |
What Changes After Installation?
- Exhaust flow: The catless pipe removes the catalytic restriction from this exhaust section.
- Sound: Exhaust and turbo sound may become louder and more noticeable.
- Odor: Exhaust odor may become stronger because no catalytic converter is present.
- Warning light: An emissions-related check-engine light may occur depending on the vehicle’s O2 sensor system and calibration.
- Performance: Actual results depend on engine condition, turbo condition, calibration and the rest of the exhaust system.
No fixed horsepower, torque or fuel-economy increase is guaranteed.
Package Contents
- 1 × Catless downpipe
- 2 × Exhaust gaskets
- Installation bolts, springs, washers and nuts as shown in the package image
Oxygen sensors are not included. Review the package image before installation and retain any original hardware that may need to be reused.
Installation Notes
Professional installation is recommended. Before removing the original exhaust component, compare the replacement downpipe with the factory pipe and verify:
- Turbo-side flange pattern
- Outlet flange and pipe diameter
- O2 sensor bung locations
- Exhaust routing and surrounding clearance
- Drivetrain and transmission configuration
Existing aftermarket exhaust components may affect alignment and connection compatibility. Inspect all mating surfaces and check for exhaust leaks after the first complete heat cycle.
Emissions & Road-Use Notice
This product does not contain a catalytic converter and is not intended to serve as an emissions-compliant catalytic-converter replacement. Installation may affect emissions compliance, inspection eligibility, exhaust odor, O2 sensor readings and check-engine-light operation.
The buyer and installer are responsible for confirming all applicable local, state and federal regulations before purchase and installation. Use only where legally permitted.
Shipping, Returns & Warranty
- Free U.S. shipping on eligible orders
- Orders are normally processed within 1–2 business days
- Unused and uninstalled products may be returned within 30 days in their original packaging, subject to the Flashark return policy
- Return-shipping coverage applies to confirmed product-quality or fulfillment issues
- Covered by a 12-month limited warranty against eligible manufacturing defects
