WGM Stage 1 Tuning Package (385 BHP) for BMW M135i M235i F2x N55

£499.00£1,224.85 Inc Vat

SKU: WGM-N55-Stage1 Categories: , Tag:


WGM Stage 1 Tuning Package for BMW M135i M235i F2x equipped with the N55 Engine (326HP model)

This is an in house service offered at WGM HQ only.  For more information on our tuning guide, click here 

An impressive 59HP with 60LBFT gain can be seen from this must-have package! Our Road and Track proven ECU software calibration takes the 35i Engine to another level boasting up to 385HP

This package is designed for an otherwise standard car (no hardware changes) however with this tuning package there are a few options;

– The first one we offer is to install charge pipe(s) as the standard cold side charge pipe is common for breaking under increased boost levels. For reliability reasons we highly recommend this upgrade. 

– High flow air filter drops in place of the standard paper filter into the standard airbox,  this is a high-quality high flow, synthetic nanofiber filtration media which is pleated to maximise surface area and in turn increase airflow, freeing up a few extra horsepowers.

– Cat-back systems can be offered, enhancing the soundtrack while keeping the standard downpipe installed retaining a full road legal set-up. Check our Exhaust listing for options

A highly recommended complimentary upgrade for the Automatic 8 Speed ZF gearboxes also includes a Gearbox tune (TCU) from xHP. Read here for more information.

This package includes the following:

  • Roading Road (Dyno Session) 
  • Before and After Printouts
  • Full data logging Session to ensure correct running
  • Labour to install optional extras
  • Developed ECU Calibration Software, which also features
  • Sport displays rescaled to suit higher outputs
  • Sport mode overrun / Decel feature (optional)
  • Switchable map modes (normal power on Comfort, with the ‘MAP’ on Sport modes)
  • Boost / Ignition Optimized 
  • AFR Optimized 

As our ECU calibration software is not Generic, we can carry out custom bespoke requests if required, just ask!

Expected Results, based on our Dyno Dynamics rolling Road:

+44-59HP (370-385HP)
+40-60LBFT (390-410LBFT)

Note – Results are based on running High Octane Fuel, Either Tesco 99 or Shell Nitro, any other fuel is deemed substandard, and results will be lower.



Additional information

Weight 0.00000000 kg
Air Filter

MMR Performance, No

Charge Pipe

Cold Side – Intercooler to Throttle Body, No

Gearbox Tune (TCU)

xHP Gearbox Tune, No