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 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...
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 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. 911, 914, 930, *993-required with use of 8mm Ti retainers.
*Not an OE replacement, requires use of HP109-KIT valve spring kit.