Previous car was a 2000 1.6K Supersport with 135 ish BHP. Took it to 'Oily' for verniers, Jenveys, Emerald ECU & plenum type air intake. Retained the Supersport cam shaft. 'Oily' estimated about 155bhp from this upgrade. Took it to emerald for RR set up & surprise the engine was pushing out 158bhp. At the time the upgrade was less than £3000. Better than changing engines or heads???