This VRSF High Flow Catered Downpipe is one of the most effective upgrades for BMWs with the N55 PWG engine. The restrictive OEM catalytic converter is replaced with a 200 cell high-flow racecat, which results in significantly less back pressure, faster turbo spooling, and a noticeable increase in power and torque. The result is sharper response, a more aggressive exhaust note, and improved performance, especially when combined with tuning.
The downpipe has a 3.5 inch (89 mm) inlet and is made entirely of hand-made TIG-welded 304 stainless steel. The CNC-machined 304 stainless steel flanges ensure a perfect fit and durability. VRSF also offers a lifetime warranty and a "No Hassle" fitment guarantee. Suitable for all BMW N55 PWG engines from the F-series.
Advantages
• 200 cell high-flow sports cat
• Faster turbo spool and less back pressure
• Power gain 20–25 hp with tuning
• 3.5 inch high-flow design
• Hand-made TIG-welded stainless steel 304
• CNC machined SS304 flanges
• More aggressive exhaust sound
• Lifetime warranty + fitment warranty
• Ideal upgrade for tuned N55 engines
Technical specifications
• Inlet diameter: 3.5 inches (89 mm)
• Type: High-flow catted downpipe
• Catalyst: 200 cell racing cat
• Material: RVS304 (TIG-welded)
• Flanges: CNC-machined stainless steel 304
• Power gain: ~20–25 hp with tuning
• Compatibility: PWG N55 F-series
Compatibility
• BMW 1-Series F20/F21 – 135i
• BMW 3-Series F30/F31/F34 – 335i
(PWG N55 only, not suitable for EWG models.)
Contents
• VRSF 3.5” High Flow Catted Downpipe
• Mounting flanges
Frequently Asked Questions
Does this downpipe fit all N55 engines?
No, only on PWG N55 F-series models. If in doubt, a VIN check is required.
Does this downpipe have a sports cat?
Yes, a 200 cell high-flow racecat for maximum flow.
How much power does the car gain?
With tuning about 20–25 hp, depending on setup.
