Mugen is to Honda what AMG is to Mercedes-Benz and each tuning consultancy has produced legends among their collection of non-turbo performance engines.Nowadays, though, with emissions regulations ever tightening, the days of the screaming Mugen four-cylinder engines and AMG M154 6.2-litre V8's are nearly over. No reason to be completely glum about it though…'MAKE MINE A 2.2, THANKS...'Mugen’s European HQ in Northampton, England, is giving the Honda K20-series naturally aspirated performance engine a (very) fitting send-off. In 2010 Mugen Europe built 20 limited-edition Type R Civic hatchbacks, each with a substantially modified version of Honda’s the engine; not it has worked its magic again to create a unique version with even more power and torque.It’s all rather pointless, as production of the Civic Type R has ceased, but you have to admire the results...The cylinder bore and stroke have been increased to create an overall capacity of 2.2 litres. The conversion, unsurprisingly, has been branded the Honda Civic Type R Mugen 2.2 and the result of the change is a boost in engine output from 177 to 191kW and 17Nm more torque to 230Nm throughout the rev range.Total power and torque gains are 30% over a standard Honda Civic Type R.When coupled to the host of motorsport-derived components created exclusively by Mugen – including sports suspension, uprated brakes and a stunning performance body kit – the Mugen 2.2 represents the ultimate expression of the Honda Civic Type R philosophy.AND THIS IS WHY...Hiro Toyoda, vice-president of Mugen Europe, explains the decision to bore and stroke an engine no longer in production: "Environmental pressures mean naturally aspirated engines are rapidly being superseded by other engine architectures and technologies."We may never see the like of the K20 in a mainstream production car again so we felt it only fitting to mark the occasion with this special 2.2 version of the Honda Civic Type R."Of the 20 limited-edition two-litre cars launched in 2010, four remain unsold; increasing the probability that Mugen may offer them with the reworked engine. Existing owners could also be invited to return their cars for a (very worthwhile) upgrade.