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Wagner Tuning

Downpipe 300CPSI catalyst N55 engine from 07/2013 for : BMW F-series 35i

(6)
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€943,95 EUR inc. VAT

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A stainless steel downpipe with a 300 CPSI racing main catalytic converter for the N55-powered BMWs, built to free up exhaust flow and lift power and torque without going fully catless. The 76mm bore reduces back pressure for better gas flow and power delivery, while the sports cat keeps a Euro 6 coating for performance with lower emissions.

It is made from SS304 (1.4301) stainless steel for durability and corrosion resistance, CAD-designed for a 100% direct fit with no modifications, and carries two lambda probe connections for flexible setups. By flowing more freely it also cuts the thermal load on the turbocharger, which helps protect it from excess heat and supports engine longevity. At just 4.0 kg, it is light as well as effective.

Key points

  • 76mm bore for reduced back pressure and improved flow
  • 300 CPSI racing main cat with Euro 6 coating
  • SS304 (1.4301) stainless steel construction
  • CAD-designed, 100% direct fit, no adjustments needed
  • Two lambda probe connections
  • 118mm connection diameter
  • Lower turbo thermal load for better longevity
  • Noticeably more power and torque
  • Lightweight at 4.0 kg

Fits (N55):

  • M135i / M135ix F20 / F21 (from 07/2013)
  • M235i / M235ix F22
  • M2 F87 (not the Competition version)
  • 335i / 335ix F30 / F31 / F34 (from 07/2013)
  • 435i / 435ix F32 / F33 (from 07/2013)
  • X3 M35i F25 LCI (from 2014)
  • X4 M35i / M40i F26 (from 07/2014)

Replaces OEM 18328602882 / Part no: 500001013

Available on request.
Estimated EU delivery: 7–14 business days.
  • Vendedor Wagner Tuning

Product Use & Compliance

Analyze this product with AI

FAQ

What does 300 CPSI mean for this catted downpipe?
CPSI is the cell density of the sports cat, and 300 is a moderate count. It balances flow with keeping emissions in check.
Why does the 07/2013 production date matter?
BMW changed details during production, so cars from 07/2013 can need a different part. Confirm your build date so the downpipe fits.
Does it fit N55 F-series 35i cars built from 07/2013?
It targets the later N55 F-series 35i cars from that date. Confirm your exact model and build date before ordering.
Is a 300 cell cat better for emissions than a lower count?
A higher cell count like 300 generally cleans the exhaust more than a lower one. It favours staying closer to road legal over maximum flow.
Will a catted downpipe stay closer to road legal?
A sports cat keeps the exhaust cleaner than a decat, helping with legality. Check your local rules before fitting.
Does it need a tune to avoid warning lights?
Changing the cat section can set a warning light without supporting software. A tune or the right catted design usually prevents it.

Customer Reviews

6 reviews

Damjan I.

Went with the 300 cell sports cat version on my F30 335i to keep things clean and avoid codes, and it's been perfect, no light at all. Flows far better than stock but stays civilised

Fulvio R.

Great balance of flow and manners, fit spot on

Basil T.

Chose the 300CPSI for my F20 M135i because I still wanted it emissions friendly, and it nails it. Made sure to get the post 07/2013 version, bolted straight to the factory setup

Olin K.

Shipping was a touch slow but the downpipe turned up well boxed with everything there

Seamus R.

Fitter said the 300 cell was a smart pick for a daily, went straight onto the stock flange. Breathes better with no drone and no fault light

Flynn P.

Wanted more flow without the hassle of a full decat, the 300CPSI hit the sweet spot. Quieter than I expected and no codes with my map