Purchased a stage 2 Thorton tuner module, then after installing it and driving the recommended 150 miles, we watched our 2025 KIA Sportage Hybrid SX Prestige loose mpg. Before the install we were averaging 38-40MPG, after install we lost 6+ mpg averaging 32-33mpg. The module curves the power-band air/fuel mixture with very high revs.We emailed the customer support and we were advised to reset the module, then reinstall it and then drive more miles again.We had enough and told them we wanted out money back. They said "unfortunately your past the 30 day money back guarantee (by 4 days) we can only replace it for you.Customers beware!!"Negative highlights"The owner of the website is using a service to hide their identity on WHOIS.This website has received mainly negative reviews
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