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PAC Racing 1200 Series Valve Springs
Valve Spring, 1200 Series, Dual, 1.539 in. Outside Diameter, 0.731 in. Inside Diameter, Each
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
PAC-1227
Part Type:
Product Line:
Summit Racing Part Number:
RSC-PAC-1227
Valve Spring Style:
Standard
Number of Springs Per Valve:
Dual
Maximum Valve Lift (in.):
0.700 in.
Retainers Included:
No
Outside Diameter of Outer Spring (in.):
1.539 in.
Coil Bind Height (in.):
1.130 in.
Damper Spring Included:
Yes
Spring Rate (lbs./in.):
500 lbs./in.
Inside Diameter of Outer Spring (in.):
1.125 in.
Inside Diameter of Inner Spring (in.):
0.731 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Quantity:
Sold individually.
Installed Height (in.):
1.950 in.
Seat Pressure at Installed Height (lbs.):
200 lbs.
Open Height (in.)(application):
1.250
Open Pressure (lbs.):
550 lbs.
Remanufactured:
No
PAC Racing 1200 Series Valve Springs
PAC Racing 1200 Series valve springs are great as replacement parts--or for pushing above and beyond the performance of OEM engines. Select them when you're upgrading camshafts or doing engine rebuilds. The 1200 Series use a premium alloy that outperforms automotive industry standards; and PAC Racing processes the alloy to aerospace shot-peening standards to achieve superior fatigue dependability. This ensures that the springs maintain the load needed to withstand rigors of both street and mild racing applications.
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Some parts are not legal for use in California or other states with similar laws / regulations
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