9mm Kit includes Aasco HP109 High Performance Valve springs, HP10T9 Titanium spring retainers and HPSS Spring Seats. Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a...
8mm Porsche 911 Titanium Retainers for 993 1995-1998 for 8mm valves. Must be used in conjunction with Aasco HP109-KIT Valve Springs and HPSS-KIT Spring Seats. (12 qty)
9mm Porsche 911 Titanium Retainers for 911, 914, 930 1965-1979 for 9mm valves. Can be used to directly replace OE retainers but we recommend using in conjunction with Aasco HP109-KIT Valve Springs and HPSS-KIT Spring...
Our Steel Spring Seats pocket the inner spring of our Aasco High Performance Valve Springs. Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from...
Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use. It operates a higher natural frequency than the original spring for racing and...
8mm Kit includes Aasco HP109 High Performance Valve springs, HP10T8 Titanium spring retainers and HPSS Spring Seats. Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a...