Wagner Tuning BMW 135i/335i N55 Catless Downpipe + EVO1 Performance Intercooler Kit | E82 E88 E90 E91 E92 E93 (FMIC Decat, Plug & Play)

BMW 135i and 335i N55 De-cat Down Pipe and Front Mounted Charge Cooler Package

Transform your E-chassis 1 Series and 3 Series turbo car with this premium Wagner package that combines a free-flow de-cat down pipe with a high efficiency stepped bar and plate charge air cooler. Expect quicker spool, stronger mid-range pull, cooler intake temps and sharper throttle response. This is a bolt-on, direct-fit upgrade that reuses factory pipework with no cutting and no bumper removal required.

Why enthusiasts choose this setup

• Noticeable gains you can feel on the road thanks to reduced exhaust back pressure and improved charge temperature control.
• Direct replacement parts designed around OEM geometry for hassle-free installation with stock hoses and brackets.
• High quality construction that copes with tuned N55 power levels and repeated hard use.

EVO1 Charge Air Cooler Upgrade – Part No. 200001023

This stepped-core bar and plate cooler unlocks consistent performance by keeping IATs in check. Core size is 520 mm x 210 mm x 130 mm, stepped for a total 11,752 cm³. That equates to an 85 percent larger frontal area and 60 percent more volume versus the factory unit, delivering outstanding thermal control and improved flow.

• Stepped high performance core with internal turbulators, approx. 9 kg.
• CAD-optimised cast aluminium end tanks for smooth internal airflow and minimal pressure drop.
• Flow-bench developed design removes OEM bottlenecks to help the turbo work more efficiently.
• Durable anti-corrosion coating that also promotes effective heat dissipation.
• Direct-fit install with factory pipework. No cutting. No bumper removal.
• Built to a high standard for consistent, repeatable results.

N55 De-cat Down Pipe

• Constructed from stainless steel 1.4301 (SS304) for long-term durability and heat resistance.
• Replaces the restrictive factory converter section with a straight-through design for maximum flow.
• Cuts turbocharger back pressure to help it spool sooner and make more torque across the rev range.
• Reduces thermal load on the turbo assembly for improved resilience under spirited driving.
• Direct bolt-on to OEM connections for a clean, straightforward fit.

Real-world results

We run this cooler and de-cat pipe on our own N55 cars and customer builds, and the difference is immediate. Cooler charge temps, stronger punch out of corners and a more responsive feel. It is a superb foundation for any N55 upgrade path.

Vehicle compatibility

• BMW 135i E82 and E88 with N55 engine
• BMW 335i and 335xi E90 E91 E92 E93 with N55 engine

What is included

• EVO1 Performance Intercooler in black
• Mounting hardware
• N55 de-cat down pipe

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk.

Compatibility check

We will verify fitment before dispatch. Please provide your UK registration or the last 7 characters of your VIN at checkout.

Part numbers

• Main kit: 700001011
• Intercooler: 200001023

Manufacturer and warranty

• Manufacturer: Wagner
• Warranty: 2 Years Manufacturer Warranty

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