Brian Crower Single Valve Springs

Fitment: Mitsubishi 4G63 / Evo 8/9

Part #: BC1100

Overview

The Brian Crower Single Valve Springs are high-performance valve springs engineered specifically for Mitsubishi 4G63 engines from 1990 to 1999 and Evo 8/9 models from 2003 to 2006. Designed for enthusiasts who demand durability and reliability under high-stress conditions, these springs are ideal for high-rpm applications, turbocharged setups, and racing environments. Crafted with precision, they help support aggressive cam profiles and increased valve lift, ensuring optimal valve control and engine response during spirited driving or competitive racing.

These valve springs are built to withstand the rigors of high-performance tuning, providing consistent spring pressure and reducing valve float at elevated engine speeds. Whether you're building a turbocharged street machine or a dedicated race engine, these springs help maintain stability and performance, contributing to overall engine durability and efficiency.

Key Features

Designed for high-rpm and high-stress applications, the Brian Crower Single Valve Springs offer several key benefits:

• Precision-machined from high-quality steel for durability and strength
• Engineered to support aggressive camshaft profiles and increased valve lift
• Helical or linear coil designs to optimize spring stability and reduce valve float
• Consistent spring pressure for reliable valve operation at high engine speeds
• Designed to withstand the thermal and mechanical stresses of high-performance engines
• Compatible with Mitsubishi 4G63 and Evo 8/9 engine configurations

Construction & Design

The springs are crafted from high-grade steel with precise winding and surface finishing to ensure longevity and reliable performance under demanding conditions. Their design focuses on maintaining consistent tension and minimizing coil bind, which is critical for high-rpm operation.

Installation & Fitment

Installation requires proper valve spring removal and installation tools, along with verification of compatibility with your specific engine build. It is recommended to consult your engine builder or professional mechanic to ensure correct fitment and setup.

What’s Included

The package includes a set of single valve springs designed for Mitsubishi 4G63 and Evo 8/9 engines, with hardware and components necessary for installation, depending on your application.