I am going to install a new catless up pipe in my 2004 wrx. I am replacing the exhaust manifold gaskets and the gasket from the turbo to the down pipe because they bother seem to be leaking. I was wondering if I will need to buy new bolts for the turbo or the manifolds? if so what bolts are they? I am just trying to get everything I might need before I start working on this in like 2 weeks.