Any long term issues? I had a 335i and when I did this, I felt as if the reaction of the car slowed down. Just my $0.02. Anyone else?
2012 E92 335is -M Sport Package- 19in M Rims- Black Sapphire Metallic/ Coral Red / Glaciar trim, Rear diffuser. Black Grille, 5% window tint. K&N drop in Air filter. Scarlett