• WGM BMW M140i/M240i Tuning Package - Stage 2 (455HP)

WGM Stage 2 Tuning package for BMW Mx40i equipped with the B58 Engine (340PS model)

An impressive 120HP with 70LBFT gain can be seen from this must-have package! Our Road and Track proven ECU software calibration takes the Mx40i to another level boasting up to 455HP

This package is designed for those seeking an improved soundtrack to their engine while picking up some extra horsepower also, Turbo spool and low-end response will be dramatically improved from the free-flowing downpipe. For those wanting to retain road legal (MOT) status, we advise a sports catalyst is required, otherwise, for optimal gains, a decatted downpipe is installed.

As standard for the downpipe, we offer the Enhance Performance 102mm tapered catless downpipe due to their superior quality and manufacturing process here in the UK. These are unrivalled with fully back purged TIG welded products which also look as good as they are made! Optional downpipes includes Wagner catless, Sports cat 200Cell or HJS Race cat. 

With this tuning package, there are a few options;

- High flow air filter drops in place of the standard paper filter into the standard airbox, we offer a K&N filter or Pipercross for this application. 

- Cat-back systems (creating a turbo back) will allow maximum exhaust flow breathing capabilities while improving the exhaust note even greater, with a few options to suit all tastes and budgets. 

- A highly recommended complementary upgrade for the Automatic 8 Speed ZF gearboxes also includes a Gearbox tune (TCU) from xHP - there is a £50 deduction as part of the package deal. 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
  • Enhance Performance Catless Downpipe
  • Labour to install downpipe
  • Developed ECU Calibration Software, which also features
  • Sport displays rescaled to suit higher outputs
  • Overrun / Decel feature (optional)
  • 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:

+90-115HP (430-455HP)
+ 60-70LBFT (460-470LBFT)


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

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

Write a review

Please login or register to review

WGM BMW M140i/M240i Tuning Package - Stage 2 (455HP)

  • Brands WG Motorworks
  • Product Code: 10-0000
  • Availability: In Stock
  • £975.00

  • Ex Tax: £812.50

Available Options