Originally Posted by BrandonSS

You also need different wheel well liners or will need to cut and modify your stock sport/base liners to fit the nismo bumper. If you go with nismo liners which are around $150-200 for the pair from the dealership, them you will also need a nismo underway. If you choose to modify your existing liners then you can drill new holes in the stock underway to secure the new nismo bumper/diffuser. It's not that hard but be prepared!