so i want to know what i can block off my s4 turbo 2 engine iam running a microtech with walbro fuel pump and 3 inch exhaust and i want to block off bac valve and air control valve what ill happen if i do that oh and egr valve and sub zero so if u know could u pm that would be nice thanks

 

don't block off the BAC. you can remove the ACV, EGR, Subzero start. If you block off the BAC you will never have a good idle