This valvetrain kit is for the P11 SR20VE heads (1N5). If you plan to upgrade your P12 (8H6) head, you much change the valves and valve guides. P12 head cams with 5.5mm valve stems. We recommend converting to the 6mm valves when going turbo.
Basic kit comes with Titanium Retainers and Dual Valve Springs. Choose your upgrades.
For all motor applications, we recommend not going higher than 93lb springs.