The map will work on standard fittings BUT the costs to replace the other parts makes sense to change either before or at the time of the remap
The exhaust may give you 5-10 bhp max ... So mines remained standard.
Handling wise if ou changed to bilsteins you will notice a dramatic improvement
B12's are available it will lower roughly 30mm but the handling difference will be dramatic I had 6's fitted to my 2.0t Signum with eibach pro springs ... Cornering speeds changed by upto 30 mph and gave real confidence in the cars ability
This is the one suspension upgrade I would consider for my 2.8
Remember the Signum in standard guise is a comfortable motorway cruiser .. Uprated will make mincemeat of smaller hotter hatchbacks and leaves them scratching their heads on what just happened
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