Custom exhaust and mapping

[Rick]

Just been to powerflow near me to chat about a custom exhuast and map, I want the V sound, I want it to growl when you boot it and bark when you rev it but i do not want the drone at 70, 80, 140... whatever cruising speed.
Very pleased to find out the guy has an 08 w12 himself so feel in good hands! He says possible 75bhp gains but will have to see, i didnt think you could get that much from an NA engine.
Be cool though!!