what part# for Koni are you running? Becasue if that matches what I'm running the only variables would be the model car (335 vs 328) and the springs. Possibly the install as well..
2008 e92 328Xi - Daily Driver
M-Tech Lip/ M-side Skirts/ Painted Grille/ 18" LM Reps/ BMS Powerbox/ Koni Sport/ B&G S2 Springs
2008 Nissan Altima Coupe - Show Car; 2009 997 TT; 1995 300ZX SMZ #36