BMW N55 Decat Downpipe – M135i, M235i, 335i, 435i, M2 (F-Series, Post-07/2013)

Unlock the true potential of your BMW N55 engine with this high-performance stainless steel decat downpipe. Crafted in the UK from T304 aircraft-grade stainless steel and TIG welded in-house, this downpipe is built for strength, flow, and durability. Laser-cut flanges (10–12mm thick) ensure a precise, leak-free fit.

Key Benefits:

• Sharper throttle response thanks to quicker turbo spool

• Power gains of 10–15bhp in real-world testing

• Deeper, more aggressive exhaust note

• Reduced backpressure and lower temps for improved engine efficiency

• Increased cylinder charge for better performance

• Substantial weight savings over the stock catalytic converter

• Mandrel-bent construction for smooth flow and maximum internal diameter without torque loss

Vehicle Compatibility (N55 engines from 07/2013+):

• BMW 1 Series (F20/F21) M135i / M135i xDrive

• BMW 2 Series (F22/F23) M235i Coupe & Convertible

• BMW 2 Series (F87) M2 (N55 engine)

• BMW 3 Series (F30/F31/F34) 335i / 335i xDrive / GT

• BMW 4 Series (F32/F33/F36) 435i / 435i xDrive Coupe, Convertible & Gran Coupe

⚠️ Note: Will not fit pre-07/2013 N55 engines (e.g., early 135i). A separate downpipe is available for those models.

Installation:
Professional fitting is recommended due to tight tolerances.