Ferrea E11000-1 7 Degree Pro CNC Titanium Valve Spring Retainer

The Ferrea E11000-1 is a precision-engineered titanium valve spring retainer designed for high-performance Honda and Acura B-Series, H-Series engines. This Pro Series retainer is CNC machined from aerospace quality titanium alloy, fully heat-treated and finished to exact tolerances, delivering professional-grade quality for racing and performance applications.

Key Features:

• 7-degree design for dual valve spring applications
• 40% weight reduction over conventional steel retainers
• Valve stem size: 5.5mm with dimensions of 28.20mm outer diameter, 22.85mm outer step diameter, and 17.15mm inner step diameter
• Compatible with Ferrea dual valve springs including S10027, S10070, S10086, and S10104
• Requires Ferrea K10034 valve locks (keepers)

Designed for high-RPM racing applications, this titanium retainer reduces valvetrain weight while maintaining the strength and durability required for aggressive camshaft profiles and high-revving builds. The reduced mass helps prevent valve float and allows your engine to rev higher with more aggressive cam profiles, making it ideal for naturally aspirated and forced induction engine builds.

Applications: Honda Civic Si B16A, Acura Integra GSR B18C1, Honda Del Sol B16A, Honda Prelude H22A, and other B-Series and H-Series DOHC VTEC engines.

Note: This listing is for one (1) individual titanium retainer. Complete engine builds require 16 retainers total (8 intake, 8 exhaust).