Hi all, I just recently bought a 09’ forester XT and it’s getting 60 psi in cylinder 4 so I’m taking the motor out to see what the issue is. If it’s on the less expensive end of fixing I wanted to add a little extra power. I was trying to stay in the $1,000 range + repairs. It has a stock 3” catback WRX exhaust. My end goal is is about 350 hp!