Wagner Tuning BMW F-Series N55 Competition Package w. cat. -6/13

Performance bundle for early BMW F-series N55 models with sports catalyst

Unlock cooler charge temps, faster spool and stronger mid‑range with this premium uprated package for the single turbo straight‑six N55. This bundle combines a high efficiency front mount charge air cooler and a stainless steel high‑flow sports cat down pipe for a true bolt‑on upgrade. Ideal for stage 1 or stage 2 remaps, spirited road use and track days, while maintaining excellent drivability and reliability.

Vehicle compatibility

Designed for early F‑series platforms with the N55 engine, build date up to 06/2013:

• BMW M135i F20 and 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

Perfect for pre‑LCI cars looking for a front mount intercooler upgrade, sports catalyst downpipe and an overall breathing and cooling improvement. Please check your VIN build date to confirm fitment.

What you get

Intercooler Upgrade Kit — Part No. 200001046

• Stepped high density core, size 520 x 210 x 130 mm, volume 11,752 cm³
• OEM reference core 510 x 130 x 110 mm, volume 7,293 cm³
• Approx. 85 percent larger frontal area than stock for lower IATs and reduced heat soak
• CAD and FEM optimised cast aluminium end tanks for maximum flow and strength
• Direct fit on factory pipework, no cutting and no bumper removal required
• Weight 6.6 kg
• Supplied with TÜV certificate

N55 Downpipe with 200 cpsi Sports Catalyst — Part No. 500001010

• Replacement for BMW OEM part number 18328603875
• Manufactured from high quality 1.4301 stainless steel, also known as SS304
• 200 cells per square inch metallic catalytic converter for high flow and durability
• Significant back pressure reduction for improved turbo efficiency and torque
• Less thermal load on the turbocharger and exhaust side
• Precision fitment, designed as a direct swap for the factory part
• Connection diameter 105 mm

Why choose this upgrade

• Lower intake air temperatures for consistent performance in all conditions
• Sharper throttle response and quicker turbo spool thanks to freer exhaust flow
• Supports tuning while enhancing reliability on the N55B30 engine
• Refined exhaust tone from the high‑flow cat without excessive drone
• Premium materials and engineering from a top European manufacturer

We have installed this setup on customer cars and on our own builds. Feedback is consistently positive, with smoother power delivery, cooler running and a noticeable uplift in mid‑range punch. A superb choice for anyone searching for an FMIC upgrade, charge cooler kit, sport cat downpipe, stainless down pipe, high‑flow catalyst or a complete N55 performance pack for early F‑series BMWs.

Packing list

• Intercooler assembly
• Mounting hardware
• Installation instructions
• TÜV certificate for the intercooler
• N55 200 cpsi sports cat downpipe

Professional fitting and support

This is a true plug‑and‑play upgrade that uses the original hoses and fixtures. For a hassle‑free install and to get the most from your setup, we recommend professional fitting at MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Search friendly highlights

BMW F20 F21 F30 F31 F32 F33 F34 N55 upgrade, FMIC kit, front mount intercooler, charge air cooler, uprated intercooler, sports cat, high flow catalytic converter, stainless downpipe SS304, performance down pipe, turbo back pressure reduction, stage 1 stage 2 tune ready, early F‑series up to 06 2013, M135i 335i 435i xDrive compatible, OEM replacement 18328603875.

Included part numbers: 200001046, 500001010