Engines and Components› Camshafts and Valvetrain

Ferrea Racing

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

$355.45

SKU: F00K E11065

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Description

This Ferrea valve spring titanium retainer kit for Subaru WRX STI EJ25 engines features a 6mm valve stem size, 25.40mm diameter, and 16.51mm inn step diameter. Designed to control harmonics and reduce wear in high-performance valvetrains, these retainers are compatible with Double Spring-6 deg Pro CNC and Ferrea Valve Lock # K10074. They are crafted from high strength alloys, heat-treated and stress relieved to increase spring life.

Fitment

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Specifications

BrandFerrea Racing
Part NumberF00K E11065

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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