K-Series Transmission Performance Select Springs Subaru WRX (2022+) The performance and durability of

The performance and durability of the calipers/rotors have been well proven under the most extreme race conditions

Replacement Filter: 21-2011DK

But we knew to bring it back

4-percent less restrictive than stock

K-Series Transmission Performance Select Springs Subaru WRX (2022+) The performance and durability ofFITS: 8th Gen Honda Civic Si 9th Gen Honda Civic Si 10th Gen Honda Accord 10th Gen Honda Type R 11th Gen Honda Type R 5th Gen Acura Integra Type S Honda officially calls these the "First 2nd Select Spring" and "Fifth Sixth Select Spring." They are the parts in your transmission that are (partially) responsible for your shifter centering itself when in neutral. By increasing the rate and preload of these springs, it's possible to realize a more