Mitsubishi EVO 4-9 4G63 Ferrea Dual Valve Spring Kit

Ferrea Valve Spring Kits bring together some of the best valvetrain components to help maximize performance specific to your engine application.
Ferrea knowledge and expertise have allowed them to build valve spring kits using components of premium quality and durability that exceed standard industry requirements.

Seat Press.: 95lbs @ 30.6mm
Open Press.:225lbs @ 20.6mm
Max Net Lift: 12.5mm

Endurance Valve Spring Kit includes the following:
Dual Spring: S10084
Titanium Retainer: E11052
Seat Locator: SL1041
Valve Locks: K10035

Valve Springs: Ferrea Valve Springs provide the stability needed for high lift, high RPM racing engines, while minimizing the load loss for today's aggressive valvetrain combinations.
Ferrea springs are heat-treated and stress relieved, which dramatically increases the spring's life.

Retainers: Ferrea retainers are fully heat-treated and finished to exact tolerances, adding strength while offering a weight reduction over conventional steel retainers.
Precision CNC-machined from aerospace quality titanium materials.

Seat Locators: Ferrea Seat locators are fully CNC machined in-house from 4140 chromoly steel alloy for different applications.
Heat treatment consists of a hard Nitrided surface for unmatched toughness and anti-wear characteristics.

Valve Locks: Ferrea Valve Locks are manufactured from high quality 4140 chromoly bar stock and machined to exact tolerances.
The locks are heat-treated for a maximum strength and finished with the black oxide for an attractive appearance.