Going to be pulling my motor on my 2007 WRX wagon. At 120k miles my clutch is on its way, I've had cooling issues before so I want to do the head gaskets now as well. I am gonna be taking my time with this one, (a lot of painting and polishing mainly).
Purchased an engine overhaul gasket kit, and exedy OEM clutch kit.

I have a list of things to purchase still, and I'm wondering what kind of parts I could use without a tune.

Here's what I was thinking of getting. I'm always open to hear from everyone else.
-Aftermarket turbo inlet (aps hard inlet or Perrin silicone)
-8mm Phenolic Spacers (not sure if a tune is required, I would think the ecu could adapt to the lower intake manifold temps)
- head studs (arp or oem? Since oem are torque to yield I'm thinking arp)
- killer b/ moroso oil pickup
- samco rad hoses, ancillary hoses
- grounding kit
- Perrin AOS

I guess I should also ask if I picked up an STi intercooler from a local, got the correct coupler to the turbo, would a tune be required? I'm NOT looking for real noticeable gains here just found a sweet deal.