There is a company in the USA called Tork Motorsports. They do an upgraded intercooler. As the factory one is quite restrictive due to the bends into it
2017 Hyundai Elantra Sport FMIC | DamnFastDD.com But as you can see. It is not cheep when you will also include shipping.
If you go through there parts that they do for these cars. They do quite a bit. But again. It all comes down to pricing.
Shark Racing also in the USA have a good range as well. But mainly cosmetic
Hyundai i30 - i30 2018+ - Page 1 - Shark RacingOther than that. There is not a lot out there for these cars. Specially if you want something local.
You could measure up the factory intercooler & match it up to something aftermarket. Then get the piping mounted up by a shop that specialises in that.
I feel that would work out cheaper than going with the Tork Motorsports delivered from the US
But it all depends on how far you would like to go with it.. With trying to get max power from the 1.6lt. You might of been better with the i30N