Ferrea Subaru STI Double Spring 6 Deg Pro CNC Titanium Retainer - Set of 16

If you're rebuilding the top end of your Subaru STI and looking for serious performance, these Ferrea titanium retainers are a solid choice. They work with the double valve springs to ensure your valvetrain stays controlled at high RPMs, which is crucial for preventing valve float and keeping your engine running strong. These are specifically made for the STI's engine, so you know they're built to handle the demands of a performance build.

Ferrea uses aerospace-grade titanium for these retainers, which makes them incredibly strong yet lightweight. The CNC machining means they're precisely shaped for a perfect fit with your valve springs and retainers, ensuring consistent performance. Because they're so light, they reduce the overall mass in the valvetrain, allowing it to operate more efficiently and reliably, especially when you're pushing the engine hard. This set includes 16 retainers, enough for a complete engine.