I see a Hyundai Elantra 1.6T option. It requires "race spark plugs" that they sell for an additional $116, and they highly recommend an oil catch can. It's claimed that it "[d]oesn't void warranty & is undetectable by the dealership or manufacturer once removed from the vehicle."
Too good to be true?
https://www.k5optimastore.com/products/lap3-performance-tune?variant=1963740292
Too good to be true?
https://www.k5optimastore.com/products/lap3-performance-tune?variant=1963740292