Wow, very nice car
The S4 is now Stage 2 single pulley, so 460bhp and over 400lb ft.
Going dual pulley as soon as lockdown over which wil see 480-490bhp but around another 100lb ft at 4k, so should be good.
Only problem is the factory cats cant take the heat so will have to get 200 cell sports cats on.
Unlike the MK5 the S4 exhaust is not restrictive so Stage 2 sing;le pulley power and have not had to tocuh the exhuast of fuel pump to get there.
Apart from the software only hardware to get that power is cai, 187mm crank pulley and Merc HX cooler.
If anyone is considering moving to an S4 give me a PM, cheers