Roush Saleen Check Engine Need Help

[s281er238]

I Have A 04 Saleen Sc With The Bassani X Pipe And High Flow Cats I Also Installed The Mif Or Mlf Adapters So It Wont Get A Check Engine. And Ever Since Then I Went To The Dealer 4 Times Already And They Replaced My O2 Sensors .whats Going On, And Now Its Back Again With Service Engine Light Need Advice Iam Going Nuts