This VRSF High-Flow Catted Downpipe is one of the most effective upgrades for BMWs fitted with the N55 PWG engine. The restrictive OEM catalytic converter is replaced by a 200-cell high-flow racecat, resulting in significantly lower back pressure, faster turbo Spool-up and a noticeable increase in power and torque. The result is sharper response, a more aggressive exhaust note and improved performance, particularly when combined with tuning.
The Downpipe has a 3.5-inch (89 mm) inlet and is manufactured entirely from hand-welded 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 in the F-series.
Benefits
• 200-cell high-flow sports
catalytic converter• Faster turbo Spool-up and reduced back pressure•
power gain of 20–25 hp with tuning•
3.5-inch high-flow design•
Handcrafted TIG-welded
SS304• CNC-machined SS304
flanges• More aggressive exhaust note•
Lifetime warranty + fitment guarantee•
Ideal upgrade for tuned N55 engines
Technical specifications
• inlet diameter: 3.5 inches (89 mm)
• Type: High-flow catted
Downpipe• catalytic converter: 200-cell
racecat• Material: 304 stainless steel (TIG-welded)
• Flanges: CNC-machined 304 stainless
steel• 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 catalytic converter?
Yes, a 200-cell high-flow race cat for maximum flow.
How much extra power does the car gain?
With tuning, approximately 20–25 hp, depending on the setup.
