HKS Valve Spring Set

Part #: 2201-RT004

Overview

The HKS Valve Spring Set is a high-performance upgrade crafted specifically for Toyota enthusiasts aiming to improve their engine's durability and responsiveness. Designed for the 1985–1991 Toyota Corolla GTS and the 1985–1989 MR2 with 1.6L and 1.5L engines, these springs help support higher engine RPMs and increased valvetrain stability. Whether you're building a high-revving naturally aspirated engine or a turbocharged setup, this set provides the reliability and performance support needed for demanding applications. Made from premium materials, these springs are engineered to withstand the stresses of aggressive driving and engine modifications, ensuring consistent valve operation and longevity.

Key Features

This valve spring set features a carefully engineered design focused on durability and performance. Key features include:

• High-quality steel construction for enhanced strength and fatigue resistance
• Precisely calibrated spring rates to support high RPM operation
• Designed to withstand increased valvetrain movement and pressure
• Optimized for turbocharged and high-performance engine builds
• Compatible with original or upgraded valve components
• Helps maintain proper valve seating and timing at elevated engine speeds

Construction & Design

Manufactured from durable steel alloys, these springs are machined to exact specifications to ensure uniformity and reliable performance. The design incorporates optimized coil geometry to reduce stress concentrations and improve heat dissipation, contributing to longer service life even under high-stress conditions.

Installation & Fitment

Installation requires removal of the cylinder head and existing valve springs, with proper compression tools recommended for safe handling. Fitment should be verified against the vehicle's specifications and the part number to ensure compatibility with your engine build.

What’s Included

The package includes a complete set of valve springs designed for the specified Toyota models, providing all necessary components for a straightforward upgrade. Hardware or additional components are not included and should be sourced separately if required.

Ideal For

This set is ideal for enthusiasts and professional tuners seeking to enhance engine durability and performance in classic Toyota models, especially those involved in high-revving or turbocharged engine builds. It’s perfect for street, track, or motorsport applications where engine reliability and response are critical.