Brian Crower Dual Valve Spring & Retainer Kit

Applicable to Mitsubishi 4G63T Engines

Part #: BC0120

Overview

The Brian Crower Dual Valve Spring & Retainer Kit for Mitsubishi 4G63T engines is a high-performance upgrade designed for enthusiasts seeking to maximize their engine's high RPM capabilities. Crafted with precision and built from premium materials, this kit enhances valve control and durability, making it ideal for high-revving applications such as racing, spirited street driving, and performance tuning.

Engineered to support aggressive camshaft profiles and increased boost levels, this kit ensures your Mitsubishi 4G63T engine maintains reliable valve operation under demanding conditions. Whether you're building a race-ready setup or enhancing your daily driver, this valve spring and retainer kit provides the stability and consistency needed for optimal performance and longevity.

Key Features

The Brian Crower Dual Valve Spring & Retainer Kit incorporates several advanced features designed to improve engine performance and durability:

• Constructed with high-grade chrome silicone alloy springs that offer consistent pressure and excellent fatigue resistance, supporting high RPM operation without valve float or instability.
• Wound from premium chrome silicone alloy wire, these springs are engineered for maximum strength and resilience, ensuring reliable valve control during aggressive driving conditions.
• Proprietary processing procedures enhance the springs' uniformity and performance consistency, reducing the risk of coil bind or spring failure at high engine speeds.
• CNC-machined titanium retainers made from 6AL4V round bar titanium provide a lightweight yet durable solution that reduces reciprocating mass and improves valve response.
• Retainers are manufactured to exacting tolerances, ensuring perfect fitment and long-term reliability under high-stress conditions.
• Designed specifically for high RPM applications, this kit helps support increased engine power and RPM limits, making it suitable for performance builds and racing setups.
• Optimized for Mitsubishi 4G63T engines, ensuring compatibility and ease of installation with factory or aftermarket components.

Construction & Design

The valve springs are wound from high-quality chrome silicone alloy wire, known for its excellent strength, fatigue resistance, and stability at elevated temperatures. The proprietary winding and processing techniques ensure each spring maintains consistent pressure and shape, critical for high RPM operation. The CNC-machined titanium retainers are crafted from 6AL4V alloy, a material renowned for its strength-to-weight ratio and corrosion resistance. These retainers are designed to withstand the rigors of high-performance use while reducing overall reciprocating mass, which contributes to improved valve response and engine efficiency.

Installation & Fitment

This kit is designed as a direct bolt-on upgrade for Mitsubishi 4G63T engines. Installation typically involves removing the cylinder head and replacing the existing valve springs and retainers with the new components. No cutting, drilling, or extensive modifications are required, but professional installation is recommended to ensure proper setup and maximum performance. Tuning adjustments may be necessary to optimize valve timing and engine parameters after installation.

• Complete valve spring and retainer kit for Mitsubishi 4G63T engines
• Requires removal of cylinder head for installation
• No additional modifications or tuning required beyond standard setup

What's Included

• High-performance dual valve springs
• CNC-machined titanium retainers
• Installation hardware and instructions

Ideal For

• High RPM engine builds
• Performance enthusiasts seeking increased valve control
• Racing applications and track-day setups
• Engine tuners aiming for reliable high-speed operation