Product Specifications
BMW N55 4-Inch Catless Downpipe for 335i, 435i, M135i, M235i & M2
A freer exhaust path gives the turbocharged N55 a more direct exhaust character and lets the turbo discharge gases move through a less restrictive section. This Flashark 4-inch catless downpipe is made for the listed BMW 335i, 435i, M135i, M235i and N55-powered M2 applications.
The stainless-steel pipe uses mandrel-bent tubing, TIG-welded joints and a CNC-machined turbocharger V-band flange. It replaces the factory catalytic downpipe section and connects to the factory exhaust or a compatible aftermarket exhaust configuration.
Specifications
| Specification | Details |
|---|---|
| Product Type | Catless turbo downpipe |
| Nominal Pipe Size | 4 inches |
| Material | Stainless steel |
| Tube Forming | Mandrel-bent tubing |
| Welding | TIG-welded joints |
| Turbo Connection | CNC-machined V-band flange |
| Catalytic Converter | Not included; catless configuration |
| Engine Application | BMW N55 3.0L turbocharged inline-six |
| Product SKU | FLES08194 |
Key Features
- 4-inch catless layout: Replaces the restrictive factory catalytic downpipe section with a freer-flowing exhaust path after the turbocharger.
- N55-specific connection: Uses a CNC-machined V-band flange at the turbocharger connection.
- Stainless-steel construction: Mandrel-bent tubing and TIG-welded joints provide a durable exhaust path.
- Potential response change: Turbo response may feel sharper; the result depends on the vehicle’s calibration, engine condition and complete intake and exhaust configuration.
- More assertive exhaust character: Removing the factory catalytic section produces a louder and more direct exhaust note.
- Factory or aftermarket exhaust use: Designed to connect with the factory exhaust or a compatible downstream exhaust configuration.
- Clear application boundaries: Intended only for the listed BMW N55 applications.
Need a Downpipe for a 2011–2012 E-Series N55?
For a 2011–2012 BMW 135i or 335i with an E82, E88, E90 or E92 chassis, view the N55 catless downpipe for E-series BMW 135i and 335i. Match the chassis, engine and model year before ordering.
What Is Included
- One 4-inch catless downpipe.
Check Before Ordering
- Match your model year, N55 engine, chassis, drivetrain, body style and turbo-side connection. The listed fitment does not establish compatibility with every N55 BMW or every xDrive configuration.
- Confirm the downstream exhaust connection on your specific car, especially if its exhaust has been modified.
- This catless pipe removes the factory catalytic converter. An emissions-related check-engine light may occur; check the rules and inspection requirements that apply to your vehicle.
- For a 2019 M2, confirm the engine and actual downpipe layout before purchase. The M2 Competition designation requires special attention.
- Confirm any required seals, clamps or hardware against your vehicle and the current package before starting work.
- Allow the exhaust system and turbo area to cool fully before beginning work.
- Protect the oxygen sensors and wiring from twisting, impact and excessive heat during removal and installation.
- Inspect sealing surfaces and connections before assembly.
- Start the engine after installation and inspect every connection for an exhaust leak.
- Existing exhaust modifications can change alignment, clearance and installation time.
- Professional installation is recommended when turbo-side exhaust work or oxygen-sensor removal is unfamiliar.
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.
