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Chirally enhanced supersymmetric QCD corrections to FCNC processes areinvestigated in the framework of the MSSM with generic sources of flavorviolation. These corrections arise from flavor-changing self-energy diagramsand can be absorbed into a finite renormalization of the squark-quark-gluinovertex. In this way enhanced two-loop and even three-loop diagrams can beefficiently included into a leading-order (LO) calculation. Our correctionssubstantially change the values of the parameters delta^{d,LL}_{23},delta^{d,LR}_{23}, delta^{d,RL}_{23}, and delta^{d,RR}_{23} extracted fromBr[B->X_s gamma] if tan(beta) is large. We find stronger (weaker) constraintscompared to the LO result for negative (positive) values of mu. The constraintson delta^{d,LR,RL}_{13} and delta^{d,LR,RL}_{23} from B_d mixing and B_s mixingchange drastically if the third-generation squark masses differ from those ofthe first two generations. K mixing is more strongly affected by the chirallyenhanced loop diagrams and even sub-percent deviations from degenerate down andstrange squark masses lead to profoundly stronger constraints ondelta^{d,LR,RL}_{12}.

Chirally enhanced corrections to FCNC processes in the generic MSSM