N55 3.5" Catless Downpipe – Fits BMW 535i 640i 740i X5 X6 (2009–2014, Pneumatic Wastegate Models)

Bring your N55-powered BMW to life with this 3.5" Race Downpipe, engineered for models equipped with the pneumatic wastegate (PWG) turbocharger. By replacing the restrictive factory catalytic converter, this downpipe unleashes the performance your turbo was built for:

• Faster turbo spool and sharper throttle response

• Aggressive exhaust tone that transforms the driving experience

• Proven dyno gains – +25–30whp with tuning

• Optimized airflow for smoother power and high-boost reliability

Constructed from 304-grade stainless steel, this downpipe features mandrel-bent 3.5" tubing to maintain consistent flow, TIG-welded joints for strength, and a CNC-machined stainless flange for a perfect, leak-free seal. Installation is direct bolt-on with OEM hardware — no cutting or welding required.

Why Choose This Downpipe?

• Best sound upgrade – unlock the raw tone of the N55

• Proven performance – dyno-tested horsepower and torque gains

• Built to last – 304 stainless steel, TIG-welded for durability

• Direct fitment – bolts on using factory hardware

• PWG-specific design – guaranteed fit for 2009–2014 pneumatic wastegate models

Technical Specs

• Material: 304-grade stainless steel

• Diameter: Full 3.5" mandrel-bent tubing

• Flange: CNC-machined 304 stainless steel

• Welding: TIG-welded for strength and corrosion resistance

• Performance: +25–30hp with tuning

• Installation: Direct bolt-on, no modifications required

• Configuration: Race setup (catalytic converter removed)

Vehicle Fitment

X5
• BMW X5 (2009–2013) (N55)

X6
• BMW X6 (2009–2014) (N55)

5 Series
• BMW 535i (2011–2014) (N55)
• BMW 535xi (2011–2014) (N55)
• BMW 535i Gran Turismo (2011–2014) (N55)
• BMW 535xi Gran Turismo (2011–2014) (N55)
• BMW 535i (2015–2016) (N55) — Email us for wastegate verification
• BMW 535xi (2015–2016) (N55) — Email us for wastegate verification
• BMW 535i Gran Turismo (2015–2016) (N55) — Email us for wastegate verification
• BMW 535xi Gran Turismo (2015–2016) (N55) — Email us for wastegate verification

6 Series
• BMW 640i Gran Coupe (2011–2014) (N55)
• BMW 640xi Gran Coupe (2011–2014) (N55)
• BMW 640i Coupe (2011–2014) (N55)
• BMW 640xi Convertible (2011–2014) (N55)
• BMW 640i Gran Coupe (2015–2017) (N55) — Email us for wastegate verification
• BMW 640xi Gran Coupe (2015–2017) (N55) — Email us for wastegate verification
• BMW 640i Coupe (2015–2017) (N55) — Email us for wastegate verification
• BMW 640xi Convertible (2015–2017) (N55) — Email us for wastegate verification

7 Series
• BMW 740i (2011–2014) (N55)
• BMW 740Li (2011–2014) (N55)
• BMW 740LiX (2011–2014) (N55)
• BMW 740i (2015) (N55) — Email us for wastegate verification
• BMW 740Li (2015) (N55) — Email us for wastegate verification
• BMW 740LiX (2015) (N55) — Email us for wastegate verification

Fitment Note

• Confirmed Fit: All 2009–2014 models listed above use the 3.5" pneumatic wastegate (PWG).

• 2015+ Models: May use either PWG or electronic wastegate (EWG). Please verify before ordering by checking your wastegate actuator:

  • PWG (compatible): Pneumatic actuator

  • EWG (not compatible): Electronic actuator

If unsure, email us with your VIN or a photo of your turbo wastegate for confirmation.

Important Note

This race downpipe is intended for off-road and track use only. It is not legal for use on public roads and may not comply with emissions regulations. Always check local laws before installation.