GSC Power Division GSC Valve Spring Kits

2009–2014 Subaru Legacy 3.6L EZ36

Part #: 5065

Overview

The GSC Power Division GSC Valve Spring Kit for the Subaru EZ36 engine is a high-performance upgrade designed for enthusiasts seeking to optimize their engine's valvetrain stability and durability. Crafted with precision, this kit features conical coil springs paired with titanium retainers and spring seats, offering a reliable solution for high-revving applications and spirited driving. Whether you're building a performance street car or preparing for track days, these valve springs help support increased valve lift and higher RPM operation, ensuring your engine maintains optimal valve control under demanding conditions.

Designed specifically for the Subaru EZ36 engine from 2009 to 2014, this kit is ideal for those looking to enhance their engine's performance potential while maintaining OEM-like reliability. The lightweight titanium retainers reduce overall valvetrain mass, contributing to improved response and reduced wear. With a maximum RPM rating of 9,000, these springs are suitable for high-performance builds that push the limits of the factory valvetrain components.

Key Features

GSC Power Division's Valve Spring Kit incorporates several advanced features to ensure superior performance and longevity:

• Conical coil design with a setup height of 1.300 inches and coil bind at 0.807 inches, providing a stable platform for high lift and high RPM operation.
• Seat pressure of 86 lbs and open pressure of 230 lbs at 10.15mm lift, supporting aggressive cam profiles and increased valve lift without valve float.
• Maximum valve lift capacity of 0.433 inches, enabling higher lift camshafts for improved airflow and power gains.
• Constructed with high-quality materials, including titanium retainers, which significantly reduce valvetrain weight and inertia, leading to quicker response and less stress on the valvetrain components.
• Precision-engineered to withstand engine speeds up to 9,000 RPM, making it suitable for high-performance and racing applications.
• Manufactured with strict quality control standards, ensuring consistent performance and durability over time.

Construction & Design

The GSC Valve Spring Kit features a conical coil spring design that provides a progressive spring rate, reducing valve train harmonics and enhancing stability at high RPM. The springs are made from high-strength steel alloy, ensuring resistance to fatigue and thermal stress. Titanium retainers are lightweight yet durable, helping to reduce overall valvetrain mass and improve response. The spring seats are precision-machined to ensure proper fitment and sealing, preventing leaks and maintaining consistent spring pressure throughout the engine's operating range.

Installation & Fitment

The GSC Valve Spring Kit is a direct bolt-on upgrade for the Subaru EZ36 engine from 2009 to 2014. Installation requires basic engine disassembly to access the valvetrain components. It is recommended that installation be performed by a qualified technician familiar with Subaru engines. No special modifications or tuning are necessary, but verifying proper spring height and seat pressure during installation is advised to ensure optimal performance and longevity.

• Complete valve spring kit with conical springs, titanium retainers, and spring seats
• Designed for high-RPM and high-lift camshaft applications
• Ideal for performance builds, racing, or high-revving street engines

What's Included

• Set of conical valve springs
• Titanium retainers
• Spring seats
• Installation hardware and instructions

Ideal For

• Performance enthusiasts seeking to upgrade their Subaru EZ36 engine
• High-RPM street and race applications
• Engine builders aiming for increased valve control and durability