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
Titanium valve spring retainers
Matching lower valve spring data-spread="false">
Vehicle: Porsche 911
Engine: Air-cooled
Model years: 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.
