What is the main benefit of using titanium retainers?

Titanium retainers are significantly lighter than steel ones. This reduced mass in the valvetrain helps the valve springs perform more effectively, especially at higher engine speeds, by decreasing the inertia the springs have to overcome.

Is this kit a direct replacement for stock valve springs?

This kit is designed as a direct fit for the specified Mitsubishi 4G63 engines. However, it is intended for performance use and may require other supporting modifications or adjustments depending on your engine build and intended RPM range.

What vehicles does this Brian Crower kit fit?

This kit is compatible with the 1990-1999 Mitsubishi Eclipse, 1990-1998 Eagle Talon, 1990-1994 Plymouth Laser, 1991-1992 Mitsubishi Galant, and 2003-2006 Mitsubishi Lancer models equipped with the 4G63 engine.

1990-1999 Mitsubishi Eclipse Valve Springs | Brian Crower BC

Name: Brian Crower Mitsubishi 4G63 Eclipse/Evo Single Spring & Titanium Retainer Kit
Brand: Brian Crower
SKU: brian-crower-brian-crower-mitsubishi-4g63-eclipse-evo-single-spring-titanium-ret-t14-21990
Price: 300.00 USD
Availability: InStock

Brian Crower Mitsubishi 4G63 Eclipse/Evo Single Spring & Titanium Retainer Kit

$300.00

Only 6 left in stock

Brian Crower Mitsubishi 4G63 Eclipse/Evo Single Spring & Titanium Retainer Kit. Improves valve control at higher RPMs for your 4G63 engine.

Key Features

Fits 1990-1999 Mitsubishi Eclipse, 1990-1998 Eagle Talon, 1990-1994 Plymouth Laser, 1991-1992 Mitsubishi Galant, and 2003-2006 Mitsubishi Lancer.
Single spring design for easier installation and setup.
Lightweight titanium retainers reduce valvetrain mass.
Improves valve control at higher engine speeds.
Well-built springs designed for performance applications.
Designed for the Mitsubishi 4G63 engine platform.

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Will this fit your vehicle?

Product Details

Brian Crower is well-known for making strong valvetrain components for performance engines. This single spring and titanium retainer kit is built for the Mitsubishi 4G63 engine, commonly found in the Eclipse, Lancer Evolution, and other DSM platforms. If you're pushing your engine past stock RPM limits, this kit helps ensure your valves stay under control.

This kit uses a single spring design, which simplifies setup compared to dual or triple spring setups. The titanium retainers are notably lighter than steel, reducing valvetrain mass. This lower mass helps the springs do their job more effectively, especially as engine speeds increase, preventing valve float and allowing for more consistent valve operation at higher RPMs. The springs themselves are well-built to handle the demands of performance applications.

This kit is designed as a direct fit for a range of popular Mitsubishi and DSM vehicles from the 90s, as well as the later Lancer models. Make sure to check the fitment list to confirm compatibility with your specific vehicle.