1200 Series Drag Race Valve Spring - 1.625 - 0.900 Lift (Set of 16). Brandname: PAC Racing Springs Part Number: PAC-1228-16 Description. All valve springs are manufactured in the USA at our Southfield Michigan Facility. Outer Spring ID: 1.175.
Inner Spring ID: 0.851. Load at Installed Height: 280. Spring Open Height: 1.150.
Recommended Valve Lift: 0.900. Coil Bind (max): 1.100. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.