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Tuning i20N Engine & ECU Tuning Discussion

Is this stage one? Are these colder plugs than oem? Does KLASEN recommend them?
As I think the gearbox of the i20N seems not very strong to me and does a lousy shifting task to me I wonder how long it will keepbup to a tune. I have to mention that before this car I had already four tuned cars. So I’ really into it but I don’t dare to do it to my i20N because of the gearbox. And I have no idea if I have reason to doubt about it…
 
Is this stage one? Are these colder plugs than oem? Does KLASEN recommend them?
As I think the gearbox of the i20N seems not very strong to me and does a lousy shifting task to me I wonder how long it will keepbup to a tune. I have to mention that before this car I had already four tuned cars. So I’ really into it but I don’t dare to do it to my i20N because of the gearbox. And I have no idea if I have reason to doubt about it…
Have you changed the oil in it yet? The oil also lubricates the LSD and after I saw reports of the oil being dirty after 10,000km I had mine changed at 16,000km and it was filthy. I used Penrite Pro Gear 70W-75 full synthetic and the shift has been really decent.