After uprgrading the performance of your car you have to be prepared to dump money into plugs/coil packs/clutch/and maybe injectors. So keep that in mind pertaining to "degrading the engine".
2015 M4 Mineral White/Sakhir Orange 6MT
Retired 2007 335i Montego Blue/Saddle Brown 6 MT
Retired 2006 325i Black/Black 6MT
, on Flickr[/IMG]