I'm running 195 bhp in tdi Alhambra that's had a remap and hybrid turbo. Was offered a money back guarantee by Evolutionchips. I need a bigger intercooler though for more power.. I have driven 45,000 miles with no problems or issues, economy is not effected or reliabilty. Recommend it highly. Manufacturers take emmisions into consideration when mapping a car to meet eu standards, after market remap only considers uk emissions standard and not what is legislated by eu standards (manufacturers produce for worldwide Market and not just uk which is irrelevant for uk residents)