The Mountune Performance Package costs £1120 plus fitting and features an uprated intercooler, air filter and ECU, taking power from 222bhp to 256bhp. Developed by Mountune with Team RS, the kit will not invalidate your warranty. from EVO.
The Dream-Science version is just a chip, and i know people at work who have paid around £400 new, not to sure on 100% what the power gains are, but they have said they have noticed extreme differences