I have done exactly that! drilled out front baffles changed air filter (kyruarkin or whatever its called got it from williams morgan) much freer reving better breathing engine. sound is not a lot different to standard, maybe a bit more of a bark! seems to be much better than factory delivered car !! but then saved up and procrastinated for ever! then went for G56 stage 2 kit...... first fitted exhaust's drove for several weeks, seemed smoother somehow exhaust note much deeper and richer!!! Then went to Krazy Horse had cam's and E.C.U. fitted and dialled in on there dyno !!!!!!! Now have a S&S engine that should be fitted as standard.so much more of everything !!!!! so i would say if you have spare $$ get the exhaust and air filter from G56 it does make the car more of what we want..Lot of money but worth it i think>>>>
