BMW M135i M235i M2 N55 Intercooler and Decat Downpipe Upgrade
Unlock cooler intake temps, faster spool and a harder-hitting exhaust note with this front mount intercooler and decat downpipe package for BMW N55 engines. Perfect for BMW M135i, M235i, M2, 335i and 435i owners who want a direct-fit, plug-and-play performance upgrade. This BMW N55 intercooler and BMW N55 decat downpipe combo is designed to deliver consistent power, lower IATs and improved throttle response while keeping installation straightforward.
Compatibility
Direct fit, plug and play on the following N55 models:
- BMW M135i July 2013 onwards
- BMW M235i July 2013 onwards
- BMW M2 all models
- BMW 335i July 2013 onwards
- BMW 435i July 2013 onwards
Why choose this BMW N55 intercooler upgrade
Engineered with a high-efficiency bar and plate core matched to flowed cast end tanks, this front mount intercooler is designed to keep intake air temperatures low under repeated pulls, delivering reliable, repeatable performance on the road.
- Massive 5 inch competition core with flowed cast end tanks and 4 extra rows at the front for increased surface area
- Internal fin on the intake side directs airflow up through the top 4 extra cores for maximum cooling
- Approx. 11.5 kg with near 100% more internal volume and 90% more frontal surface area than the standard intercooler
- Dimensions: 520 mm x 210 mm x 130 mm. For reference, these dimensions match Wagner
- Direct fit, plug-and-play install. Allow around 1 to 2 hours. Professional installation recommended
Real-world temperature results
Tested back to back over five road runs: intercooler intake temperatures were comparable between the factory and this upgraded intercooler at 135 to 140 degrees. Post-intercooler temperatures into the engine were 75 to 80 degrees on the standard unit versus high 20s with this intercooler over all five runs. The result is cooler IATs, consistent power and improved performance pull after pull.
BMW N55 decat downpipe benefits
This decat downpipe fits all N55 engines from July 2013 onwards. It will not fit the 135i pre July 2013.
- T304 high-grade stainless steel construction, TIG welded in-house in the UK
- Laser-cut flanges, 10 to 12 mm thick for durability and precise sealing
- Sharper throttle response thanks to faster turbo spool
- Noticeable power gains with a more aggressive exhaust note
- Reduced exhaust backpressure and lower temperatures, improving turbo efficiency and cylinder charge
- Significant weight saving versus the factory catalytic converter
- Mandrel-bent for superior gas flow and maximum internal diameter to maintain mid-range torque
We have tested this product and seen gains of approximately 10 to 15 bhp.
We recommend adding a Lambda Sensor Spacer to help prevent the engine light in most cases. These are available in our other items.
Installation, support and fitting
Installation is generally straightforward, though tolerances can vary between exhaust systems, so professional fitting is recommended. For expert installation, book with Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Proven results and happy customers
We run this setup ourselves and our customers consistently report cooler IATs, stronger mid-range, faster spool and a far more engaging drive. This is a superb BMW N55 intercooler and catless downpipe package for M135i, M235i, M2, 335i and 435i owners looking for reliable, repeatable performance on the road or track.
What you get
- 1 x Front Mount Intercooler for BMW N55
- 1 x Decat Downpipe for BMW N55 (July 2013 onwards)
Warranty
This product comes with a lifetime warranty.
Important notes
Decat downpipes are intended for off-road or track use only where permitted. Please check local laws and regulations before purchase and installation.
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