We strip down a 5.2l V10 engine in the Audi S8 — the car came in originally to us for a dyno run, and then carbon clean and stage 2. But as you’ll see in this video, what started as a straightforward tuning job very quickly turned into something much bigger when we heard a metallic knock at the back
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![Audi RS4 B9 - Dyno testing Deep Dive [ Plots | Boost levels | Intake Temps ]](https://i.ytimg.com/vi/VI_kwR1VP7M/hqdefault.jpg)
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