High-Performance Valve Springs 911/964/993

Proven for years on the race track and on the road

Our friends AASCO Motorsports' valve springs are designed and manufactured to specifically fit the envelope of a Porsche application and are not a spring from another use. It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations.The package includes 12 pieces of valve springs, 12 pieces of steel lower spring retainers and 12 pieces of titanium upper spring retainers.

Made in the USA