VRSF N55 3.5 inch 200 Cell High Flow Sports Cat Downpipe for BMW F-Chassis F20/F21 M135i & F30 335i (PWG Pre-07/2013) - TIG Welded 304 Stainless

Transform throttle response and turbo spool on your early F-series N55 with this 3.5in catted turbo outlet upgrade featuring a 200 CPSI metallic core. Built from TIG-welded 304 stainless steel with smooth mandrel bends and CNC-machined flanges, it is a proven bolt-on for performance-focused BMW owners who want flow, durability and a richer exhaust tone without the drone.

We run this hardware on our own builds and on customer cars. Feedback has been consistently excellent for drivability, quicker boost onset and real-world pace, especially when paired with a suitable remap. Expect meaningful gains with tuning and a more purposeful soundtrack from your six-cylinder without sacrificing refinement.

Key reasons enthusiasts choose this catted turbo down pipe

• 200 CPSI metallic sport catalytic converter lowers backpressure and frees up exhaust flow
• Noticeably faster turbo response and improved mid-range pull on PWG N55 engines
• Deeper, sportier exhaust character while retaining day-to-day civility
• TIG-welded 304 stainless construction with smooth radius bends for optimum gas velocity
• Precision CNC SS304 flanges for reliable, leak-free sealing
• Typical gains around 20 to 25 bhp with an appropriate tune
• Optional high-temperature ceramic coating to keep heat energy in the exhaust and reduce under-bonnet temps
• Manufacturer lifetime warranty on the pipework. Ceramic coating and catted versions carry a 1 year warranty

Compatibility - early F-series PWG models

Designed for pneumatic wastegate N55 vehicles built up to 07/2013:

• BMW F20 F21 M135i - up to 07/2013
• BMW F30 335i - up to 07/2013

If your car is 07/2013 onwards with the electronic wastegate, you typically need the larger 4.0in version. Unsure which you have? Email the last 7 digits of your VIN and we will verify the correct part for your chassis before you order.

What you can expect

• Direct-fit upgrade using factory-style mounting points
• Smoother, earlier boost build and stronger in-gear acceleration
• Ideal foundation for Stage 2 style remaps and supporting hardware
• Built to withstand UK road conditions with corrosion-resistant materials

Ceramic coating option

For even better thermal management, add our professional high-temp ceramic coating. It helps retain exhaust energy for improved efficiency and reduces heat soak around the turbo area. Coating warranty is 1 year.

Installation and support

Prefer a hassle-free, professional fit? Book installation with MJ Modifications in Warwickshire. We can supply and fit, confirm PWG or EWG by VIN, and liaise on tuning requirements. Request a fitting quote at info@mjmodifications.co.uk.

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Order today for fast UK dispatch and unlock the sound and performance your N55 deserves.