Brian Crower BC0100 Single Valve Spring & Titanium Retainer Kit

The Brian Crower BC0100 Single Valve Spring and Titanium Retainer Kit delivers precision-engineered valve train components designed for high-RPM performance in Mitsubishi 4G63 engines found in Eclipse and Evolution models. This system-matched kit combines premium valve springs with ultra-lightweight titanium retainers to improve valve control, prevent valve float, and support aggressive camshaft profiles.

High-Performance Valve Springs:

• Wound from super clean chrome silicone alloy for superior strength and durability
• Proprietary processing procedures including precision chamfering and deburring
• Engineered to maintain consistent seat pressure during extended high-RPM operation
• Prevents premature valve float for reliable performance at elevated engine speeds

CNC-Machined Titanium Retainers:

• Precision machined from premium 6AL4V titanium bar stock to exacting tolerances
• Approximately 40% lighter than OEM steel retainers for reduced valve train mass
• Allows for faster valve actuation and improved response at high RPM
• Reduces stress on valve train components for improved longevity

System-Matched Design:

• Spring and retainer components are engineered to work together as a complete system
• Enables use of higher lift camshafts for increased performance potential
• Provides better valve control throughout the RPM range
• Ideal upgrade for built engines, forced induction applications, and competition use

This kit represents a critical upgrade for enthusiasts building high-performance 4G63 engines, offering the valve train control necessary to support aggressive camshaft profiles and sustained high-RPM operation. Brian Crower's reputation for precision manufacturing ensures reliable performance in demanding applications.