Perrin 19-21 WRX STI Panel Filter | PSP-INT-114
Perrin 18-20 Subaru WRX STI Panel Filter
The PERRIN High-Flow Washable Replacement Air Filter is the last filter you will ever need to buy. It is washable and will increase horsepower with very little work to install, making it one of the easiest upgrades for your car!
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