Hey Radovan,
Sorry for my delayed response. Some time ago, I discussed about intakes in SkyActiv engines with Mat from OrangeVirus Tuning. That was about MX-5
but this is almost the same 2.0 SkyActive-G engine. Mat wrote:
"intakes make no actual power gains on the MX5. Don't believe the dyno sheets. I have tested almost all intakes on the dyno to verify, no gains. Some intakes actually produce worse results (like the injen intake)
best modifications for the car is remap + exhaust"
Now, maybe a few words about remap... From my personal experience, I don't have a good experience with remaping 165hp version.
Mat always promised good gains, but on dyno... it was no so good. Maybe I saw MX-5 dyno?
https://www.facebook.com/DISItune/posts/1337719586264268
In reality, I do not think you can count on much better results. But maybe...
Of course, if You want, we can buy (I can buy for You) tune at OrangeVirus and, when Mat will finish we can fine tune this.
400 euro was price for Orange Virus tune and fine tune on "my" dyno locally in Poland.
In the topic of exhaust systems - that was strongest 120hp SkyActiv after remap that I saw, and tune:
http://disi-tune.pl/2016/08/02/mazda-3-2-0-skyactiv-120km-mitsubishi-ecu-intake-exhaust/
This car has complete exhaust, but no corksport or something, it wasn't perfect in low to middle rpms, but that was 4-1.
With good 4-2-1 exhaust manifold low to mid rpms should be better than on stock.
regards,
Michał Bryczkowski
+48 600411990
biuro@disi-tune.pl
www.disi-tune.pl