BMW M135i Pre-July Intercooler and Decat Downpipe Upgrade for N55 Pre-EWG
Unlock cooler charge temps, faster spool and real-world power with this high-performance BMW M135i intercooler and decat downpipe package designed for early N55 pre-EWG engines. If you are searching for a BMW M135i intercooler upgrade, BMW M135i decat downpipe, catless downpipe or de-cat pipe for a 2012 to June 2013 car, this plug-and-play solution delivers outstanding results, sharper throttle response and a more aggressive exhaust note. We have used and fitted these ourselves at Nforcd and our customers have been extremely happy with the performance gains and consistency.
Fitment and compatibility
- BMW M135i 2012 to June 2013 only (N55 pre-July, pre-EWG)
- Does not fit M135i models from July 2013 onwards. If your car is a 63 plate or newer, this will not fit
- If you are unsure about fitment, please contact us
Why choose this M135i intercooler and de-cat downpipe bundle
- Reduces heat soak and intake air temperatures for consistent performance
- Improves turbo efficiency, throttle response and overall drivability
- Noticeable power gains and a stronger, more purposeful exhaust tone
- Direct fit, plug-and-play hardware engineered for reliability
Intercooler engineering and features
- Bar-and-plate core matched to flowed cast end tanks for maximum cooling efficiency
- Massive 5 inch competition core with 4 extra rows at the front to increase surface area
- Internal fin added on the intake side to direct airflow up through the top 4 extra cores
- Near 100 percent more volume and 90 percent more surface area than the standard intercooler
- Dimensions: 520 mm x 210 mm x 130 mm (same as the Wagner dimensions)
- Weight: 11.5 kg
- Direct fit; professional installation recommended. Typical fitting time approximately 1 to 2 hours
Proven intercooler results
- Measured intercooler intake temperatures of 135 to 140 degrees over 5 back-to-back road runs on both the OE and MTC intercooler
- At the outlet into the engine, the standard intercooler saw 75 to 80 degrees
- The MTC intercooler delivered outlet temperatures in the high 20s across all 5 runs
- Massively reduced IAT means more consistent power and repeatable performance
Decat downpipe specifications and benefits
- Machined from T304 high-grade stainless steel, TIG welded in-house
- UK-fabricated with laser-cut 10 to 12 mm flanges for durability and sealing
- Mandrel-bent for optimal gas flow and maximum internal size without sacrificing mid-range torque
- Sharper throttle response thanks to faster turbo spool
- Lower temperatures and reduced exhaust backpressure increase cylinder charge
- Substantial weight saving versus the factory catalytic converter
- Noticeable power gains and a much more aggressive exhaust note
- Tested gains of 10 to 15 bhp observed
Decat downpipe fitment
- BMW M135i pre-July 2013 with early N55 engines only
Installation, support and fitting
- Direct fit, plug-and-play. Professional installation recommended
- We suggest purchasing Lambda Sensor Spacer(s) to help prevent the engine light from coming on in most cases
- For expert fitting, contact Nforcd in Warwickshire. Request a quote: Sales@nforcd.com
What you get
- Front mount intercooler for BMW M135i early N55
- Decat downpipe for pre-July 2013 N55 (pre-EWG)
Warranty
This product comes with a lifetime warranty.
If you are searching for BMW M135i intercooler, BMW M135i decat pipe, BMW M135i catless downpipe, N55 intercooler upgrade, pre-July 2013 M135i downpipe or BMW M135i performance upgrade, this package is the proven choice for early N55 owners who want cooler IAT, stronger performance and reliable hardware.