Ferrea E12021-1 Pro CNC Titanium Valve Spring Retainer Beehive Mitsubishi 4G63

The Ferrea E12021-1 is a premium Pro CNC Series titanium valve spring retainer engineered specifically for beehive valve springs in Mitsubishi 4G63 and 4G63T engines. This high-performance retainer is sold as a single unit and is designed for use in Eclipse GS-GST, Evolution, and DSM applications.

Key Features:

• Precision CNC machined from aerospace-grade titanium alloy for maximum strength and reliability
• Fully heat treated and finished to exact tolerances for consistent performance
• Offers 40% weight reduction compared to conventional steel retainers
• Designed specifically for beehive valve spring applications
• Compatible with Ferrea S2015 beehive valve springs
• Ideal for high-revving street/strip and racing applications

Ferrea's Pro CNC titanium retainers are the choice of professional engine builders who demand precision valvetrain components. The significant weight reduction helps minimize valvetrain mass, allowing for higher RPM operation and reduced risk of valve float. Each retainer is crafted to exact OD and ID specifications with a flat, parallel spring pad surface ensuring proper valve spring retention even under extreme racing conditions.