The Audi RS5 is an undoubtedly impressive car. Although, no matter how much power and performance is available out-of-the-box, there's always room for improvement. Case in point, SKN Tuning has released their own approach to tuning the RS5 with the introduction of the SKN Audi RS5², boosting the RS5's 4.2-liter V8 to over 500 horsepower.
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