Update did the long drawn out engine braking albeit just from 70mph down to 40-50mph, over the course of 114 miles today averaged 36mpg, and then after a refuel 43mpg over 13 miles.
No experiance in this scenario, but from previous I would always go with the expert recommendations here. If they say it'll be to loud and sound rubbish, it will be waaaay too loud and sound like a tractor mate
Is it possible to code out front fog lights with OBD11? or VCDS? Thinking about the TCR front bumper holes where the fog lights are and if its possible to retro fit.