BMW M135i Pre-July Intercooler and Decat Downpipe


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MTC Motorsport BMW M135i Front Mount Intercooler and Decat Pipe for Early N55 Engines.
The intercooler and Decat will fit plug and play with the following vehicles with N55 engine:
BMW M135i 2012 – June 2013 only 

We have engineered these intercoolers using a bar and plate core matched to our flowed cast end tanks. This is the most efficient way to keep the intake temperatures low.
We have tested our intercoolers on a few vehicles and found they have absolutely fantastic results. The IAT compared to the standard intercooler are reduced massively which means you get consistent increased performance.
The standard intercooler and the MTC intercooler both had intercooler intake temperatures of between 135-140 degrees through 5 runs on the road.
At the other side of the intercooler into the engine the standard intercooler temps were between 75-80 degrees whereas the MTC intercooler temperatures were in the high 20’s over all 5 runs.

The MTC intercooler features a massive 5″ competition core with flowed cast end tanks and 4 rows extra at the front to increase the surface area
We have added a fin to the inside of the casting on the intake side to direct some of the airflow up through the top 4 extra cores
This intercooler weighs 11.5kg and provides near 100% more volume and 90% more surface area than the standard intercooler
Dimensions are 520mm X 210mm X 130mm which is a huge increase on the standard intercooler. For comparison, these dimensions are the exact same as the Wagner dimensions.
The intercooler is a direct fit and there are some great videos on YouTube to follow. However, professional installation is recommended and should take approximately 1-2 hours.

We would go as far as to say this is the best intercooler on the market for these models.
This downpipe will fit all N55 engines that were manufactures before July 2013 which is pre-EWG. This will not fit the M135i from July 2013 and onwards. Please ask if you are unsure. 

Machined from T304 high-grade stainless steel and are tig welded in house
The decat is fabricated in the UK and the flanges are laser cut between 10-12mm
Sharper throttle response due to faster spool of the turbo
Noticeable power gains and a much more aggressive exhaust note which sounds truly amazing
It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. Also, the cylinder charge is increased
There is also a substantial weight saving in comparison to the factory catalytic converter

Mandrel-bent for better gas flow and maximum internal size to ensure ultimate performance without the loss of mid-range torque. 

This decat will fit the following models:

BMW M135i pre July 2013  

We have tested this product and found increases of 10-15bhp. 
Professional installation is recommended as some exhausts sit slightly different from others and can be tight although the feedback we have received from this product is that it is very easy to fit.
We also recommend purchasing a Lambda Sensor Spacer(s) to prevent the engine light coming on in most cases. If you search our other items you will find these. 
This product comes with lifetime warranty.
If you would like this product fitted to your car in our Lancashire workshop please give us a call and we can arrange this and also do an exchange with your original cat which usually covers the cost of the downpipe and fitting from us.
If your car is a 63 plate or newer this will not fit and you will need to see our other items for the newer one.

Shipping Continents: Europe

Shipping Countries: United Kingdom (UK)


Shipping Policy

MTC Motorsport ships Monday-Friday excluding holidays. The shipping cut-off time is 13:30pm (GMT). Orders placed after 13:30pm will be processed the next business day. All orders will be shipped express, usually arriving within 24 hours (UK only).

For orders outside of the UK, an surcharge will occur.

Where do you ship to?

How long will my order take?
Once your order has been dispatched, you’ll receive an email with tracking information.

UK: next day


Refund Policy

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. You’ll also need the receipt or proof of purchase.

To start your return or for any returns queries, please contact us at [email protected].

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Please note, to offset the cost of order processing, the customer will be charged a restocking fee by MTC Motorsport on all returned goods unless we accept liability for any unsuitable or faulty item. An amount of 10% of the purchase price plus the original postage will be applied.

Weight 2 kg
Product Brand

MTC Motorsport

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