Subaru OEM Spark Plug WRX/ STI 2018-2021 | 22401AA910 vendor_Forced Performance but you need the specific

but you need the specific bore size for both your wheel and car

but here they are

Ground Flange for a Leak Free Install

double layer cotton to increase the filtration surface by 10% - 15%

Subaru OEM Spark Plug WRX/ STI 2018-2021 | 22401AA910 vendor_Forced Performance but you need the specificFitment Information: Subaru STI 2018 2021 Warranty Disclaimer: Subaru of America will only warranty parts installed by a CERTIFIED Subaru Dealership. The part being installed must also match the vehicle VIN. IE If you install an STi block in a WRX at your friends shop, do not expect a warranty claim to come through if it explodes! Please use your best judgement.