BMW M135i N55 Decat Downpipe - Pre July 2013 PWG Pre-EWG
Upgrade your BMW M135i with this high-flow N55 decat downpipe for a serious performance gain. Designed for pre-July 2013 PWG pre-EWG cars, this catless turbo downpipe reduces backpressure, improves turbo spool and delivers a sharper throttle response with a harder-hitting exhaust note. Ideal for enthusiasts who want maximum flow and power from their N55 without compromise.
Key performance benefits
- Noticeable power gains - we have tested this product and seen 10 to 15 bhp increases
- Faster turbo spool for stronger mid-range and sharper throttle response
- More aggressive, motorsport-inspired exhaust sound
- Lower exhaust gas temperatures and reduced backpressure to relieve the turbocharger
- Weight saving compared with the factory catalytic converter
Quality construction
- Manufactured from T304 high-grade stainless steel
- Expertly TIG welded and fabricated in the UK for strength and durability
- Laser-cut flanges between 10 to 12 mm for a precise, secure seal
- Mandrel-bent for optimal gas flow and maximum internal diameter to maintain mid-range torque
- Direct bolt-on fitment to the OEM system on compatible cars
Fitment and compatibility
This downpipe fits the BMW M135i with the N55 engine built before July 2013 - PWG pre-EWG cars only. If your car is a 63 plate or newer this will not fit. It will not fit M135i models from July 2013 onwards.
- BMW M135i 2012 to pre-July 2013
Unsure about your build date or wastegate type? Contact us and we will confirm compatibility for you.
Real-world results
We have used this decat downpipe ourselves on customer cars and feedback has been excellent. Fitment is straightforward and the transformation in response and sound is exactly what N55 owners are looking for.
Recommended extras
We recommend adding Lambda Sensor Spacer(s) to help prevent the engine management light in most cases. Check our other items to find the correct spacers for your setup.
Professional fitting available
Professional installation is recommended, as factory exhaust tolerances can vary slightly. For hassle-free fitting, book in with Nforcd at our Warwickshire workshop. Request a fitting quote at Sales@nforcd.com.
Warranty
Supplied with a lifetime warranty for complete peace of mind.
Popular search terms
BMW M135i decat downpipe pre-2013, BMW M135i N55 downpipe, BMW 135i N55 decat, M135i catless downpipe 2012, N55 pre-EWG downpipe, PWG N55 turbo downpipe, F20 F21 M135i decat, BMW N55 performance exhaust upgrade, M135i downpipe upgrade UK, T304 stainless downpipe M135i.