Wagner BMW N55 Catted Downpipe 200 Cell High-Flow Sports Cat SS304 - M135i F20/F21, 335i F30/F31/F34, 435i F32/F33 - Up to 06/2013 - OEM 18328603875 - 500001010

Wagner Tuning N55 High-Flow Catalyst Front Pipe for BMW M135i, 335i, 435i up to 06/2013

Transform throttle response and boost ramp on your N55-powered BMW with this premium 200 CPSI metallic high-flow catalyst from Wagner Tuning. Crafted from corrosion-resistant 1.4301 stainless steel, this turbo outlet front pipe is a direct swap for the restrictive factory unit on early N55 models, improving exhaust gas flow for more punch across the rev range while retaining a catalytic converter. It replaces BMW part 18328603875 and carries Wagner part number 500001010.

We have installed this on multiple customer cars in-house and it is consistently a standout upgrade. Fit is bang on, the quality of the welds and finish is excellent, and the driving difference is immediate with sharper pick-up and stronger mid-range pull. If you are searching for a performance catalyst for BMW N55, a turbo outlet front pipe for M135i, or a high-flow cat for F30 335i and F32 435i, this is the proven choice.

Highlights

• 200 CPSI high-flow metallic catalyst for reduced exhaust back pressure
• 1.4301 SS304 stainless steel construction for durability and corrosion resistance
• Lower thermal load on the turbocharger to aid reliability
• OEM-style fitment with factory lambda sensor ports
• Direct replacement for BMW OE 18328603875
• Connection diameter 105 mm
• Bolt-on install with no cutting required
• Manufacturer warranty 2 years

Fitment up to 06/2013

• BMW M135i F20 F21 up to 06/2013
• BMW 335i and 335i xDrive F30 F31 F34 up to 06/2013
• BMW 435i and 435i xDrive F32 F33 up to 06/2013

Why enthusiasts choose this upgrade

This performance catalyst is designed to let the N55 turbo breathe more freely, bringing quicker spool, a more responsive throttle, and a deeper exhaust note without the harshness of a decat. The precision-engineered 1.4301 stainless body and high-quality welds ensure long-term reliability, and the plug-and-play fit means straightforward installation. Our customers consistently report a livelier feel on the road and improved mid-range torque.

Installation and support

We recommend replacing the turbo to front pipe gasket during installation for best sealing. Need fitting

Book professional installation at MJ Modifications in Warwickshire. For a quote, email info@mjmodifications.co.uk.

Important note

A DME error display may be possible.

Part numbers

• Manufacturer part number: 500001010
• Replaces OEM BMW part: 18328603875

Popular search terms

BMW N55 performance catalyst, M135i F20 F21 front cat, F30 335i high flow cat, F31 335i xDrive turbo outlet, F34 335i Gran Turismo exhaust upgrade, F32 435i catalytic converter upgrade, F33 435i xDrive front pipe, BMW N55 turbo outlet pipe, 200 CPSI catalyst N55, stainless 1.4301 cat pipe, Wagner Tuning N55 front catalyst, BMW N55 exhaust front section, M135i performance cat UK, 335i F30 sports catalyst, 435i F32 high flow catalytic converter.