• .490in valve spring and retainer kit, 16 each
• Matched spring and retainer sold together
• Valve locks not included, sold separately
• Supports moderate cam upgrades over stock springs

A Matched Spring and Retainer, No Guesswork

This Manley kit bundles both the valve spring and retainer together at .490 inches, taking the guesswork out of matching two separately purchased components. Buying spring and retainer as a matched kit ensures correct installed height and spring binding clearance right out of the box, rather than needing to cross-reference two different part numbers to confirm compatibility. That's a genuinely simpler path to a valvetrain upgrade for anyone not already deep into Manley's individual part number system. That's the kind of detail that separates genuine engineering from a basic replacement part.

Valve Locks Sold Separately

This kit does not include valve locks, so you'll need to source those separately to complete the installation. That's worth planning for before you start the job, since valve locks are a small but essential part of actually retaining the spring and retainer on the valve stem. With 16 each of spring and retainer included, this kit covers a complete EJ20/EJ25-based engine in one purchase. It's a small distinction that makes a real difference once you're actually building the engine.

Straight From Subispeed

A conveniently matched spring and retainer kit for 2002-2005 WRX / 2004-2011 STI — just remember to source valve locks separately before starting the job.

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