Wagner Tuning BMW N55 F20 F21 F30 F31 F34 F32 F33 M135i 335i 435i Competition Stepped FMIC/Front Mount Intercooler + Catless/Decat Downpipe Bundle | Stage 2 Remap Turbo Upgrade | Pre 06/2013, xDrive Compatible (200001046 & 500001014)

BMW F-series N55 performance bundle with decat downpipe and stepped front mount intercooler

Unlock cooler charge temps, quicker turbo spool and freer exhaust flow on your N55-powered BMW with this premium upgrade bundle. This kit pairs a high-efficiency stepped FMIC with a stainless decat downpipe to reduce back pressure and heat soak for stronger, more consistent performance. Our team at MJ Modifications has installed this setup on multiple customer cars and the feedback has been fantastic for drivability, throttle response and repeatable power on fast road and track.

Vehicle compatibility

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

Intercooler upgrade kit — part no. 200001046

• Stepped high-density core: 520 x 210 x 130 mm
• Core volume: 11,752 cm³ vs OEM 7,293 cm³
• Approx. 85 percent larger external face area than the factory cooler
• CAD and FEM optimised cast aluminium end tanks for excellent flow
• Direct fit using the original pipework. No cutting and no bumper removal
• Weight: 6.6 kg
• TUV certificate included

Decat downpipe for N55 — part no. 500001014

• Replaces OEM BMW part no. 18328603875
• Manufactured from high-grade stainless steel 1.4301 (SS304)
• Precision fit to the factory system
• Lower thermal load on the turbocharger
• Reduced exhaust restriction for improved power potential and noticeably more torque
• No catalytic converter fitted
• Connection diameter: 105 mm

What you get

• Intercooler assembly
• Mounting hardware
• Installation guide
• TUV certificate
• N55 decat downpipe

Why choose this bundle

• Ideal foundation for remaps and Stage 2 tuning on the N55 straight six
• Helps maintain low intake air temperatures and reliable boost on spirited drives
• Enhances throttle response and midrange punch on M135i, 335i and 435i models
• Front mount intercooler and exhaust upgrade designed to work with factory plumbing

Professional installation

Need fitting? Book with MJ Modifications in Warwickshire for expert installation and setup. Email info@mjmodifications.co.uk for a quote.

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