K&N Replacement Air Filter for 08-21 WRX / 08-18 STi (33-2304) Skunk2 heavy Brembos and rotors and

heavy Brembos and rotors and clears room to run 15" wheels and slicks for drag racing applications and lose almost 50 pounds

375" (137mm) Top OD: 4

if you have any questions on the install process

5-Speed Models

K&N Replacement Air Filter for 08-21 WRX / 08-18 STi (33-2304) Skunk2 heavy Brembos and rotors andK&N drop in factory style replacement panel air filter for the 2008 2021 Subaru WRX and 2008 2018 STi. Designed to install easily into your stock air box and increase power. K&N filters are washable, reusable and engineered to last for the entire lifespan of your vehicle. Vehicle Fitment: 2008 2021 Subaru WRX 2008 2018 Subaru STi Note this does not fit 2019+ STi. Use K&N 33 5092 for 2019+ STi. Includes: (1) Air Filter Replacement for these OEM Part