Thank you for viewing. This is an HKS air cleaner that was used on a WRXS4. It can also be installed on a Levorg. They share the same FA20 engine. *Instruction manual included I removed it recently, and it was working without any problems. The filter was just replaced. The mounting hardware is included, but I used different ones, so I'm not sure if everything is there. However, you can install it without any issues using the current screws. Please understand that I cannot accept any claims after purchase. Thank you for your understanding.