BMW M135i M2 N55 Intercooler and Decat Downpipe Kit – Front Mount Intercooler Upgrade and Catless Downpipe for N55 Engines
Unlock reliable, repeatable power and cooler intake temps with this performance bundle designed for BMW N55 engines. This kit combines a high-flow front mount intercooler with a stainless steel decat downpipe to deliver lower IATs, faster turbo spool, sharper throttle response and a more aggressive exhaust note. It is a true plug-and-play upgrade for the models listed below.
Compatible vehicles – N55 engine
- 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 N55 intercooler and decat downpipe combo
- Significantly reduced intake air temperatures for consistent performance
- Improved turbo efficiency with lower backpressure
- Noticeable power gains and crisper throttle response
- Direct-fit, plug-and-play installation
- Fabricated from premium materials for durability and reliability
- Backed by a lifetime warranty
Intercooler upgrade details and proven results
Engineered with a bar-and-plate core and flowed cast end tanks, this intercooler is designed to keep intake temperatures low and reduce heat soak under repeated pulls. We have tested these intercoolers on multiple vehicles and the results are fantastic. Through five back-to-back road runs, intercooler intake temperatures were between 135–140 degrees on both the standard and this upgraded intercooler. Measured at the outlet into the engine, the standard intercooler recorded 75–80 degrees, whereas this intercooler delivered temperatures in the high 20s across all five runs. The result is reliable, repeatable performance.
- Massive 5 inch competition core with flowed cast end tanks and 4 extra rows at the front to increase surface area
- Internal fin on the intake side directs airflow through the top 4 extra cores for maximum efficiency
- Dimensions: 520 mm x 210 mm x 130 mm
- Weight: 11.5 kg
- Near 100 percent more volume and 90 percent more surface area than the standard intercooler
- Dimensions match those commonly referenced for leading alternatives
- Direct fit with straightforward installation, with plenty of fitting videos available
We would go as far as to say this is one of the best intercoolers available for these BMW N55 models. We have installed and used this setup ourselves and customer feedback has been excellent, especially regarding consistency and heat management.
Decat downpipe details and gains
The decat downpipe fits all N55 engines from July 2013 onwards. It will not fit the 135i pre July 2013. We also supply a version for earlier models in our other items.
- Machined from T304 high-grade stainless steel and TIG welded
- Fabricated in the UK with laser-cut flanges 10–12 mm thick
- Mandrel bent for superior gas flow and maximum internal diameter
- Sharper throttle response due to faster turbo spool
- Reduced exhaust backpressure and lower temperatures, improving turbocharger efficiency
- Substantial weight saving compared to the factory catalytic converter
- Noticeable power gains and a deeper, more aggressive exhaust tone
We have tested this product and found increases of 10–15 bhp.
We recommend purchasing a Lambda Sensor Spacer to help prevent the engine light from coming on in most cases. You will find suitable options in our other items.
Installation, fitting and support
Both intercooler and downpipe are direct-fit upgrades. Professional installation is recommended, especially as exhaust alignment can vary slightly car to car. Typical fitting time for the intercooler is around 1–2 hours.
For expert fitting, book in with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Warranty
This product is supplied with a lifetime warranty.
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