ND Downpipe 4″ BMW N55 F10 535i 640i F15 X5 F16 X6

Norcal Dynamics N55 Race Downpipe – BMW 535i & 640i

Norcal Dynamics is proud to offer our premium race downpipe upgrade for BMW 535i and 640i models equipped with the N55 engine.

This direct bolt-on, high-flow downpipe is one of the most impactful performance upgrades available. By replacing the restrictive factory catalytic converter, our downpipe dramatically reduces back pressure—resulting in quicker turbo spool, increased horsepower, and a more aggressive exhaust note.

Each downpipe is meticulously handcrafted using 4” TIG-welded SS304 stainless steel, ensuring durability, performance, and a precise fit. We stand behind our craftsmanship with a lifetime warranty and our "No Hassle" satisfaction guarantee, which includes fitment support.

To ensure proper compatibility, we highly recommend sending us a photo of your existing downpipe from the engine bay to confirm fitment before ordering.

Features:
- Handcrafted from TIG-welded 304-grade stainless steel
- Direct bolt-on installation
- Smooth radius bends for optimized exhaust flow
- CNC-machined SS304 stainless steel flange
- Gains of 25–30hp when paired with tuning
- Norcal Dynamics Lifetime Warranty

Fitment Applications:
(Please verify turbo wastegate type: pneumatic vs. electronic)
- 2011–2016 BMW 535i & 535Xi – F10 & F11
- 2011–2016 BMW 535i & 535Xi Gran Turismo – F07
- 2011–2017 BMW 640i & 640Xi Gran Coupé
- 2011–2017 BMW 640i Coupe & Convertible – F12 & F13
- 2011–2015 BMW 740i & 740LiX – F01 & F02
- 2014–2018 BMW X5 35iX – F15 (4.0″ – Electronic Wastegate)
- 2015–2019 BMW X6 35iX – F16 (4.0″ – Electronic Wastegate)