dude, you can't replace the rear quarter yourself. This requires some major body shop work. Your car is unibody construction. Meaning the majority of the car is one solid unit. To replace the rear quarter, the original one needs to be cut out first and the new one welded back in. You are looking at around 8k of parts and labour at least at a reputable shop.
Go: Dinan CAI/Stage II ECU/Stage III Suspension/Exhaust, OZ Superleggera III, VRS CF Trunk, P3Cars Boost Gauge, Performance Steering Wheel
Show: LED Angel Eyes, CF Kidney Grill, Arkym CF Front Lip, CF VRS Style Rear Diffuser, Side Reflector Delete