Upgrade your Porsche 911’s valvetrain with this complete AASCO 9mm spring and retainer kit. Made in the USA to the highest quality standards, this kit combines high-performance valve springs, titanium retainers, and matching spring seats for a premium valvetrain upgrade.

The dual-spring arrangement features nested inner and outer springs, paired with titanium retainers and dedicated lower spring seats. Together, these components provide a complete spring and retainer package for compatible air-cooled Porsche 911 applications.

Kit includes

• High-performance inner and outer valve springs

• Titanium valve spring retainers

• Matching lower valve spring seats

Application

• Vehicle: Porsche 911

• Engine: Air-cooled

• Model years: 1965–1994

• Specification: 9mm complete spring/retainer kit

• Country of manufacture: USA

Confirm compatibility with your valves, valve locks, camshaft, and cylinder heads before installation. Refer to the manufacturer’s specifications for spring pressures, installed height, maximum valve lift, and coil-bind clearance.