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Howards Cams Max Effort Mechanical Roller Valve Springs 98431-1
Part Number: HRS-98431-1
Howards Cams Max Effort Mechanical Roller Valve Springs
Valve Spring, Dual, 1.437 in. Outside Diameter, 380 lbs./in. Rate, 1.250 in. Coil Bind Height, Each
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Estimated Ship Date: Dec 29, 2026
Overview
Brand:
Manufacturer's Part Number:
98431-1
Part Type:
Product Line:
Summit Racing Part Number:
HRS-98431-1
UPC:
840793125456
Valve Spring Style:
Standard
Number of Springs Per Valve:
Dual
Maximum Valve Lift (in.):
0.590 in.
Retainers Included:
No
Outside Diameter of Outer Spring (in.):
1.437 in.
Coil Bind Height (in.):
1.250 in.
Damper Spring Included:
Yes
Spring Rate (lbs./in.):
380 lbs./in.
Inside Diameter of Inner Spring (in.):
0.800 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Quantity:
Sold individually.
Installed Height (in.):
1.750 in.
Seat Pressure at Installed Height (lbs.):
200 lbs.
Open Height (in.)(application):
1.250
Open Pressure (lbs.):
390 lbs.
Remanufactured:
No
Howards Cams Max Effort Mechanical Roller Valve Springs
Howards Cams Max Effort mechanical roller valve springs are made using only the highest quality valve spring wire. CNC-coiled and heat-treated in the finest facilities available, these valve springs are stress-relieved, ground, and shot-peened. Whether you're running a flat tappet or roller cam in your drag race, Circle Track, road course, performance marine, or other extreme race application, Howards offers the perfect valve springs to suit your needs.
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