Injectors could be source of burnt valve.
If all other valves are ok, replace just the bad one and shim just that one. You'd be best off taking the head somewhere that does them alot. They will have a collection of buckets to choose from. They cost about $25 each and sometimes it takes 2 or 3 tries before you get the right set of buckets. Stock valves are just fine.
How did you get a 200+ psi compression result?
If you are mostly stock, use stock headgaskets. If you are going to rebuild the motor yourself, get headstuds instead of the stock bolts. All you need is a torque wrench to install them. (stock bolts cannot be re-used and are tightened by torque-angle instead of just torque.) If the car is stage 2 or higher, go with something like Cosworth gaskets and switch to headstuds for sure.
I'd hate to see a turbo with 120k go back on a motor like that. It's a tough call whether to re-use or not.
2005 Outback FMT
Last edited by mwiener2; 02-11-2013 at 12:06 AM..