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Manley NexTek Valve Spring and Retainer Kits
Nex Tek Valve Springs/ Titanium Retainers, Super Gas/Comp/Big Block Bracket, Kit
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Estimated Ship Date: Oct 27, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
261424
Part Type:
Product Line:
Summit Racing Part Number:
MAN-261424
UPC:
807298023571
Valve Spring Style:
Standard
Number of Springs Per Valve:
Dual
Maximum Valve Lift (in.):
0.880 in.
Retainers Included:
Yes
Retainer Material:
Titanium
Outside Diameter of Outer Spring (in.):
1.640 in.
Coil Bind Height (in.):
1.070 in.
Damper Spring Included:
No
Spring Rate (lbs./in.):
647 lbs./in.
Inside Diameter of Outer Spring (in.):
1.185 in.
Inside Diameter of Inner Spring (in.):
0.860 in.
Locks Included:
No
Lock Style:
10 degree
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Valve Stem Diameter (in.):
0.375 in.
Valve Stem Diameter (mm):
9.53mm
Quantity:
Sold as a kit.
Notes:
+ 0.100 in. installed height.
Make:
CHEVROLET
Engine Family:
Chevy big block Mark IV
Installed Height (in.):
2.000 in.
Seat Pressure at Installed Height (lbs.):
250 lbs.
Open Height (in.)(application):
1.150
Open Pressure (lbs.):
800 lbs.
Remanufactured:
No
Manley NexTek Valve Spring and Retainer Kits
Manley NexTek valve spring and retainer kits are designed and manufactured for optimum consistency, run after run, lap after lap. They are manufactured from super clean high-tensile chrome silicon steel that has been shot peened to MIL specs for maximum fatigue life. Proven to have less load loss than many other springs, they exhibit superior fatigue life and enhance valvetrain stability--everything that counts in winning races!
Applications
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