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NEXTEK VALVE SPRINGS, RETAINERS, LOCATORS, AND LOCKS - learn more about our valve spings, retainers, locators, locks
Manley valve springs are wound from super clean alloy. Each design minimizes stress to ensure long service life with high lift camshafts. Retainers are manufactured in our own double spindle CNC machines to exacting tolerances and precise installed height specifications. Locators are manufactured in our own CNC lathes. Heat treated and black oxided after machining. Valve locks are manufactured in our own Swiss turning centers with rigid control over the all-important angle to ensure precise mating with the retainer.
 
NEXTEK VALVE SPRINGS
Part No. Description Max Valve Lift O.D. I.D. Installed/Open Pressure Rate (lbs/in) Coil Bind Steel Retainer # Titanium Retainer #
  Stock Diameter Single Conical Ovate Wire
221428-16 SBC LS-Series,
LT-1/LT-4/L-98
High Performance Street/Strip
.600" 1.076" Top
1.311" Bottom
.650" Top
.885" Bottom
150 @ 1.800
355 @ 1.200
341 1.085" 23620-16 23622-16
23625-16 (+.050)
  SuperFinished Stock Diameter Single Conical Ovate Wire
221438-16 SBC LS Series,
LT-1/LT-4/L-98
High Performance Street/Strip
.650" 1.076" Top
1.311" Bottom
.650" Top
.885" Bottom
150 lbs. @ 1.800"
375 lbs. @ 1.150"
353 1.100" 23620-16 23622-16
23625-16 (+.050)
  Fully Polished Double Without Damper
221436-16 SBC LS-Series,
High Performance Street/Strip
.660" 1.295" .676" 155 @ 1.810
405 @ 1.150
379 1.100" 23621-16 23623-16
221435-16 SBC LS Series,
High Performance Street/Strip
.700" 1.340" .726" 170 @ 1.810
446 @ 1.110
394 1.050" 23610-16 (+.050) 23611-16 (+.050)
 
7° TITANIUM & STEEL RETAINERS
Valve Stem
Diameter
Dimensions
Part # Quantity Spring Degree A B C Height Valve Locks
  7° Titanium
23622-16
23625-16
16 pcs. 221428-16 .3133"/.3136" .935" .640" --- Stock
+.050"
13098-16
23623-16 16 pcs. 221436-16 .3133"/.3136" 1.155" .950" .675" Stock 13098-16
23611-16 16 pcs. 221435-16 .3133"/.3136" 1.200" .985" .715" +.050" 13098-16
  7° Steel
23631-16 16 pcs. 221423-16 .3133"/.3136" 1.155" .825" --- Stock 13098-16
23620-16 16 pcs. 221428-16 .3133"/.3136" .935" .640" --- Stock 13098-16
23621-16 16 pcs. 221436-16 .3133"/.3136" 1.155" .950" .675" +.050" 13098-16
23610-16 16 pcs. 221435-16 .3133"/.3136" 1.200" .985" .715" +.050" 13098-16
 
I.D. VALVE SPRING LOCATORS
Part No. Quantity Spring # Locator I.D. Locator O.D. Thickness Shoulder Diameter
  Chevy LS-1 / 2 / 6 / 7 / L-92
42336-16 16 pcs. 221428-16 / 221438-16 .505" 1.290" .062" .875"
42338-16 16 pcs. 221428-16 / 221438-16 .505" 1.290" .035" .875"
42334-16 16 pcs. 221436-16 .505" 1.270" .035" .675"
42348-16 16 pcs. 221435-16 .505" 1.320" .035" .715"
42135-16 16 pcs. 221435-16 .567" 1.320" .035" .715"
 
7° MACHINED VALVE LOCKS
Part No. Quantity Valve Stem Groove Type Angle Wgt./Pr.
  Chevy LS-1 / 2 / 6 / 7 / L-92
13098-16 16 pr. .3133" / .3136" Bead Loc® Chevy LS-1 2.6 gms
 

WEAR CAPS
Manley wear caps are ideal for applications where valve tip protection is required, but the valve itself does not have a hardened tip surface. Wear caps are typically used with titanium valve applications. They are manufactured from 4140 alloy steel bar stock to very tight tolerances so that the fitment to the valve is accurate and precise. A special heat treatment is performed to achieve and insure the proper, elevated hardness required to prevent erosion.
Part No. Quantity Description Minimum Tip Type Thickness
42125-8 8 pcs. .3130" stem valves (8 mm) .130" Standard .080"
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