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PAC Racing 1200 Series Circle Track Valve Springs
Valve Springs, 1200 Series Circle Track, Dual, 1.550 in. O.D., 550 lbs./in. Rate, 1.100 in. Coil Bind Height, Set of 16
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Estimated Ship Date: Monday 10/19/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
PAC-1243-16
Part Type:
Product Line:
Summit Racing Part Number:
RSC-PAC-1243-16
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.):
1.550 in.
Coil Bind Height (in.):
1.100 in.
Damper Spring Included:
No
Spring Rate (lbs./in.):
550 lbs./in.
Inside Diameter of Outer Spring (in.):
1.136 in.
Inside Diameter of Inner Spring (in.):
0.812 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Quantity:
Sold as a set of 16.
Installed Height (in.):
1.900 in.
Seat Pressure at Installed Height (lbs.):
240 lbs.
Open Height (in.)(application):
1.200
Open Pressure (lbs.):
625 lbs.
Remanufactured:
No
PAC Racing 1200 Series Circle Track Valve Springs
PAC Racing 1200 Series circle track valve springs are great for providing your valve train with optimal performance. 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 perform lap-after-lap.
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