Racebox on Instagram: "700+whp “downpipes & tune” S58! 🫡 Another example of what a simple stock turbos stock fuel system setup G8X can do! @s58.tony’s M4 originally came to us for a @femtoevo unlock, and @mhdtuning OTS tune flash. He eventually wanted more power, so came back for the custom sauce! The car was already on ethanol, so we did not dyno the stock tune or OTS tune on 93, but scroll through our page and you’ll see plenty of examples of what those run! Dyno results (all done on E47 mix)