its not boost pressure that breaks stuff its hp so keep that in mind. any d16 is capable of 220-250hp max on stock block but me personally i wouldnt go over 220.depending on the size of the turbo you might need more or less the 6 psi to make 200hp, im running a garret super 60 at 7 psi making 166hp 149tq but my tune is real conservative so i dont blow up my stock block. no need for arp studs,fuel pump or fpr with the low goals your aiming for. my motor is completely stock and i dont have any head lift or anything like that. fpr can hold up to 400hp if i remember right and i wouldnt get a fuel pump for anything under 200hp.