This Stainless steel downpipe decat for the BMW 440i (F3x LCI) with B58 engine is a performance upgrade that significantly improves exhaust gas flow. By removing the catalytic converter, back pressure is reduced, resulting in more power, higher torque and faster turbo response.
With a perfect OEM fit and 80 mm diameter This downpipe is easy to install without modifications. In combination with a Stage 2 tune, impressive performance is possible.
To +104 hp and +170 Nm profit (depending on setup)
Advantages
• Significantly improved exhaust gas flow
• Faster turbo spool and response
• Significant power and torque gains with tuning
• Perfect OEM fit
• Deeper and more aggressive exhaust note
Technical specifications
• Material: 304 stainless steel
• Diameter: 80 mm
• Connection: OEM (80 mm)
• Type: decat downpipe
• Year of construction: from 2016
Performance (Stage 2 indication)
• Power: 326 hp → ±430 hp
• Torque: 450 Nm → ±620 Nm
Results depend on tuning and other upgrades
Compatibility
BMW
• BMW 440i F32 (Coupe) – B58
• BMW 440i F33 (Convertible) – B58
• BMW 440i F36 (Gran Coupé) – B58
• BMW 440i xDrive (F3x LCI) – B58
Euro 6 models
3.0T B58 engine
Important information
• ECU tuning (Stage 2) required for optimal results
• Can cause error codes without software modification
• Not permitted for use on public roads (depending on the country)
Contents
• Stainless steel downpipe
Frequently Asked Questions
What does a decat downpipe do?
It removes the catalytic converter, allowing the exhaust gases to flow through faster.
Is this plug & play?
Yes, this downpipe has OEM connections and fits directly.
Is tuning mandatory?
For optimal performance and to prevent error codes: yes.
