Help Tailshaft Hitting Tunnel

[crossingover]

hi guys ive just lowered the au with king springs and koni shocks sits very low looks a1 but under heavy acceleration in take off sounds like tailshaft is hitting tunnel under the console i have 19 inch wheels with 275 tyres on rear im wondering have i gone too low i want to keep it this height but not happy with noise also can it do damage car is extremely low but is not a daily driven hoping to put it in shows ill post pics in a few days SO ALL AU EXPERTS how do i fix this issue please help