BMW 135i N55 Decat Downpipe M135i 2012 - Pre June 2013

MTC Motorsport BMW M135i M235i 335i 435i Decat Downpipe

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.

• The BMW 135i downpipe is 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. 

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.

This product comes with lifetime warranty.

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.