Oil pan removal and install on Subaru STi/WRX:

Oil Pan Installation Steps:

Tools required:
3/8″ ratchet and or breaker bar
1/4″ ratchet
1/2″ ratchet and or breaker bar (optional but highly recommended)
6 or 8″ extension for each size ratchet
universal joint for each size ratchet
1/4″ 10mm socket
19mm socket
14mm socket
14mm wrench
12mm socket
12mm wrench
flat screwdriver
jack stands or wheel ramps (your choice)
floor jack
4×4 wood block approximately 10-14″ long
Torque wrench
PB Blaster or equivalent