I have the 265 Komotec kit fitted to my 2015 S club Racer,
carried out during 2020 , completed about 5k miles.car currently on 26K.
My setup included 2Tublar complete system and Cat, with all the remaining parts Komotec.
Fitted in the UK by H111;
rolling road recorded 255bhp and 199 lb ft torque
there are a few completed 220/250 cup in the uk showing between 255/265bhp,
to be honest it drives much better than when it was standard 217 bhp,The idle and town driving feel much smoother and the power has a solid smooth push to the limiter.
did I really need the extra power ,probably not , but it is a great addition with no negatives regarding the mods,
the numbers don’t reflect how much more go the car can deliver.
FYI, Super unleaded is a requirement on this kit.
Regarding noise all ZR engines with the complete system are noisy, mine is acceptable for the long journeys for holiday etc but not for the quieter track day circuits.
Gear change on my car is lovely and slick, it doesn’t have the post 17.5 engineered feel but I am more than happy.
195 tyres are fine on the standard 6” rims which all supercharged S3 220 came on , will move to them this year as 175 unavailable or getting on date wise.
if in doubt stick with OEM spec, as I said before I probably didn’t work the original hard enough , let alone the new increased power setup.
happy hunting,
Stephen