3.5" N55 Downpipe Upgrade for 2012 – 2013.7 BMW M135i/335i/M2 F20/F21/F22/F30/F32/F33/F87

Unlock the True Potential of Your N55

Transform your BMW's performance and soundtrack with the Flashark High-Flow Downpipe. Specifically engineered for the early F-chassis N55 engine, this upgrade removes the primary bottleneck in your exhaust system, allowing your turbo to breathe, spool faster, and deliver massive power gains.

Engineered for Quality

• 100% Bolt-On Installation: No cutting, welding, or permanent modification required. All factory O2 sensor bungs are retained in their original positions.

• Maximum Flow: The smooth mandrel-bent tubing ensures zero internal restrictions, unlike the crimped factory piping.

• Complete Hardware Kit: Every downpipe comes with the necessary gaskets and high-strength bolts to ensure a leak-free seal from day one.
  
  

Features

• Precision 3.5" Fitment: Designed exclusively for N55 models produced between 2012 and July 2013. (Please verify your turbo outlet size is 3.5" before ordering).

• Significant Power Gains: Expect an increase of 15-25 HP and 20+ lb-ft of torque when paired with a Stage 2 tune.

• Faster Turbo Spool: Mandrel-bent piping reduces backpressure, significantly cutting down turbo lag for instant throttle response.

• T304 Stainless Steel: Built to last with heavy-duty, corrosion-resistant stainless steel and precision TIG-welded seams.

• Aggressive Sound: Gives your N55 a deep, throaty growl under acceleration while maintaining civility during daily cruising.

Pro Tip for BMW Owners:

To get the most out of this hardware and avoid a "Check Engine Light" (CEL), we highly recommend a Stage 2 ECU Flash (like Bootmod3 or MHD). This will calibrate your engine for the increased airflow and maximize your Horsepower gains!

What’s in the Box?

• (1) 3.5" N55 High-Flow Downpipe

• (1) High-Temperature Flange Gasket

• (1) Set of Heavy-Duty Mounting Bolts