Had my sl55 tweaked by msl.kleeman headers,pulley upgrade,primary cat delete,new intercooler pump.whilst there it was discovered that the engine mounts had had there day so they were replaced.picked the car up yesterday evening.met that man acid,thoroughly nice bloke at the top of his game.car is now just about as good as it gets in my book.see the dyno run on msl Facebook page,sounds even meaner in the flesh.thanks to acid and his guys top notch sevice.