Product Specifications
BMW N54 Downpipes for 2007–2010 335i and 2008–2010 135i
These Flashark N54 downpipes replace the turbocharger-side exhaust sections on the listed BMW 335i and 135i 3.0L twin-turbo applications. The paired design uses a 3-inch V-band turbo-side inlet and a 2.5-inch flanged outlet to connect to a compatible rear exhaust section. Check your engine code, drive configuration, body style, and connections before ordering.
Specifications
| Specification | Details |
|---|---|
| Configuration | Two turbo downpipes |
| Pipe diameter | 3-inch design |
| Turbo-side inlet | 3-inch V-band |
| Rear outlet | 2.5-inch flange |
| Material | T-304 stainless steel, 16 gauge |
| Construction | Mandrel-bent tubing, TIG-welded joints, CNC-machined flanges |
Key Features
- Paired turbo-side pipes: Replace both downpipe sections directly after the twin turbochargers.
- Stepped connections: The 3-inch V-band inlet and 2.5-inch flanged outlet serve different ends of the exhaust connection; the size difference is intentional.
- Mandrel-bent tubing: Provides the bends needed to route the pipes through the installation area while maintaining smooth internal flow.
- TIG-welded joints and CNC-machined flanges: Provide defined joints and mating surfaces for connection and sealing checks.
- Stainless-steel construction: The listed T-304, 16-gauge material is described for exhaust heat, vibration, and corrosion exposure.
Check Before Ordering
- Confirm the N54 engine code using your VIN, factory build information, service records, or a BMW parts catalog; model name and year alone are insufficient. The current product information excludes N55 applications.
- Match your exact year, trim, body, and RWD configuration to the Fitment table. A 2007 135i is outside the stated range. Obtain SKU-specific confirmation for a 135i Hatchback, xDrive, 335is, 1 Series M, diesel, or another unlisted configuration.
- Compare the turbo-side V-band, rear flange, oxygen-sensor connections, and available clearance with your vehicle and rear exhaust section.
- The gallery shows gaskets and bolts; confirm the current package count with Flashark before ordering.
- Confirm the catalytic-converter configuration of the supplied pipes and the requirements that apply to your vehicle and location. This product is not represented here as an emissions-compliant replacement part.
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.
