Originally Posted by
lup15
what are you trying to achieve with the car?
exhaust manifold and electronic boost controller. I'm not too sure how the MPS is setup from factory regarding boost control. however from my experience, an ebc will keep the wastegate shut for as long as possible until the desired boost is reached. this will help in response by building boost quicker rather than letting the wastegate slowly open. once again, you will need to check that adding an ebc wont screw anything up
also perhaps changing the front end bushes to polyurethane?
just regarding RSB, you dont want the rear end too stiff especially since you have coilovers. But doesn't hurt to try, you might need to tweak the coilover rates to get it right