So I have a 2014 STI with 50k on the motor and it just blew. I just had GCH longblocks start my stage one longblock and need to know what else I'll need to hit the 500+ HP area. They said the longblock will handle around 620HP. What should I look for and what would I need to do to make that 500+ HP mark. Any help would be amazing. I'm new to the flat 4 world but have a good understanding of what it really takes to make good HP in the tuning world.