BMW M135i Intercooler and Decat Downpipe Upgrade for early N55 engines – pre-July 2013 pre-EWG. Serious cooling and serious flow for your 2012 to June 2013 BMW M135i. This front mount intercooler and catless downpipe combo delivers lower intake air temperatures, faster turbo spool, stronger mid-range and top-end power, plus a more aggressive exhaust note. Ideal for anyone searching for a BMW M135i intercooler upgrade, BMW M135i downpipe, N55 decat pipe, FMIC, 5 inch intercooler, or N55 catless downpipe.
Fitment
- BMW M135i 2012 to June 2013 only – early N55 pre-EWG.
- Will not fit M135i models from July 2013 onwards. If your car is a 63 plate or newer this will not fit. Please contact us if you are unsure.
Why choose this M135i intercooler and decat kit
We have tested these parts on multiple vehicles and used them ourselves, and customer feedback has been excellent. Expect dramatically reduced IATs for consistent performance and superb throttle response from the freer-flowing downpipe.
Intercooler features and performance
- Bar and plate competition core – a massive 5 inch depth with flowed cast end tanks for maximum efficiency.
- Four extra rows at the front increase surface area and cooling capacity.
- Internal fin on the intake side directs airflow to the top four additional cores to optimise charge-air distribution.
- Near 100 percent more volume and roughly 90 percent more surface area than the standard intercooler.
- Dimensions: 520 mm x 210 mm x 130 mm – the same footprint as popular Wagner dimensions.
- Weight: 11.5 kg.
- Direct fit plug and play – professional installation recommended, approximately 1 to 2 hours. Plenty of helpful videos online.
Road testing over five consecutive pulls showed intercooler intake temperatures of 135 to 140 degrees for both the standard and MTC intercooler. Post-intercooler into the engine, the standard unit saw 75 to 80 degrees, whereas the MTC intercooler consistently delivered temperatures in the high 20s. This means repeatable, reliable power in real-world conditions. We would go as far as to say this is the best intercooler on the market for these models.
Decat downpipe features and gains
- Machined from T304 high-grade stainless steel with TIG-welded construction.
- Fabricated in the UK with laser-cut flanges 10 to 12 mm thick for durability and a precise seal.
- Sharper throttle response thanks to faster turbo spool.
- Noticeable power gains and a more aggressive exhaust note – we have seen increases of 10 to 15 bhp.
- Lower exhaust gas temperatures and reduced backpressure to relieve the turbocharger and improve cylinder filling.
- Substantial weight saving compared with the factory catalytic converter.
- Mandrel-bent for optimal gas flow and maximum internal diameter without sacrificing mid-range torque.
- Fitment: BMW M135i pre-July 2013 N55 pre-EWG only.
Recommended extras
- We recommend adding a lambda sensor spacer to help prevent the engine light illuminating in most cases.
Installation and support
Professional installation is recommended, as exhaust alignment can vary slightly between vehicles. Our customers report an easy fit and great results.
Want us to fit it for you? Nforcd offers fitting at our Warwickshire facility. Request a quote at Sales@nforcd.com.
Warranty
This product comes with a lifetime warranty.
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