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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 23617-16
23623-16 (+.050")
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")
221421-16 SBC LS-Series,
High Performance Hydraulic Roller
.800" 1.324" .676" 165 @ 1.800"
515 @ 1.000"
435 .900" 23618-16 (+050")
  Super Finished Double Without Damper
221422-16 SBC LS-Series,
High Performance Solid Roller
.780" 1.335" .622" 270 @ 1.800"
870 @ 1.020"
780 .960" 23619-16 (+.050")
 
VALVE SPRING KITS
  • Kits are sold with genuine NexTek® valvesprings and Manley manufactured matching components
  • Don't settle for "offshore made" retainers, locators and locks with sloppy tolerances yielding inconsistent installed heights
  • See catalog for more NexTek® valvespring part numbers to accomodate higher lift cams
Part No. Application NexTek®
Spring No.
7° Steel
Retainer No.
I.D. Valve Spring
Locator No.
7° Machined
Valve Lock No.
Viton Valve
Stem Seals No.
26382038KS SBC LS-Series, .600" Max. Lift 221438-16 23620-16 42338-16 13098-16 24042-16
26362134KS SBC LS-Series, .660" Max. Lift 221436-16 23621-16 42334-16 13098-16 24042-16

Part No. Application NexTek®
Spring No.
7° Steel
Retainer No.
I.D. Valve Spring
Locator No.
7° Machined
Valve Lock No.
Viton Valve
Stem Seals No.
26382538KS SBC LS-Series, .650" Max. Lift 221438-16 23625-16 42338-16 13098-16 24042-16
26361734KLS SBC LS-Series, .560" Max. Lift 221436-16 23617-16 42334-16 13094-16 24042-16
26362334KS SBC LS-Series, .660" Max. Lift 221436-16 23623-16 42334-16 13098-16 24042-16

Part No. Application NexTek®
Spring No.
7° Steel
Retainer No.
I.D. Valve Spring
Locator No.
7° Machined
Valve Lock No.
Viton Valve
Stem Seals No.
26380638KS SBC LS-Series, .600" Max. Lift 221438-16 23606TS-16 42338-16 13153-16 24042-16
26361634KS SBC LS-Series, .660" Max. Lift 221436-16 23616TS-16 42334-16 13153-16 24042-16
 
TITANIUM & STEEL RETAINERS
Valve Stem
Diameter
Dimensions (Retainer Step Dimension Chart)
Part # Quantity Spring Degree A B C Height Valve Locks
  Titanium
23622-16
23625-16
16 pcs. 221428-16/221438-16 .3133"/.3136" .935" .640" .570" Stock
+.050"
13098-16
23617-16 16 pcs. 221436-16 .3133"/.3136" 1.155" .950" .675" Stock 13098-16
23623-16 16 pcs. 221436-16 .3133"/.3136" 1.155" .950" .675" +.050" 13098-16
23611-16 16 pcs. 221435-16 .3133"/.3136" 1.200" .985" .715" +.050" 13098-16
23618-16 16 pcs. 221421-16 .3133"/.3136" 1.200" .910" .666" +.050" 13098-16
23619-16 16 pcs. 221422-16 .3133"/.3136" 10° 1.235" .900" .615" +.050" 13153-16
  7° Steel
23620-16 16 pcs. 221428-16/221438-16 .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
  10° H-13 Tool Steel
23606TS-16 16 pcs. 221428-16/221438-16 .3133"/.3136" 10° .935" .640" --- Stock 13153-16
23616TS-16 16 pcs. 221436-16 .3133"/.3136" 10° 1.155" .950" .675" +.050" 13153-16
23615TS-16 16 pcs. 221435-16 .3133"/.3136" 10° 1.190" .985" .715" Stock 13153-16
 
I.D. VALVE SPRING LOCATORS
Part No. Quantity Spring # Locator I.D. Locator O.D. Thickness Shoulder Diameter
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"
42349-16 16 pcs. 221428-16 / 221438-16 .570" 1.290" .062" .875"
42334-16 16 pcs. 221436-16 .505" 1.270" .035" .675"
42138-16 16 pcs. 221436-16 .505" 1.270" .062" .675"
42124-16 16 pcs. 221436-16 .570" 1.270" .062" .675"
42348-16 16 pcs. 221435-16 .505" 1.320" .035" .715"
42135-16 16 pcs. 221435-16 .567" 1.320" .035" .715"
42117-16 16 pcs. 221421-16 .505" 1.300" .035" .665"
42130-16 16 pcs. 221421-16 .567" 1.300" .035" .665"
42129-16 16 pcs. 221422-16 .505" 1.310" .035" .615"
42131-16 16 pcs. 221422-16 .567" 1.310" .035" .615"
 
7° MACHINED VALVE LOCKS
  • Highest quality steel alloy
  • Heat treated and black oxide finished
Part No. Quantity Valve Stem Groove Type Wgt./Pr.
13094-16 16 pr. 8mm (.3135") Single Radius Chevy LS, LT1 (.050" less) 2.6 gms
13098-16 16 pr. 8mm (.3135") Single Radius Chevy LS, LT1 (Std.) 2.6 gms
13095-16 16 pr. 8mm (.3135") Single Radius Chevy LS, LT1 (.050" more) 2.6 gms
 
PRECISION CRAFTED 10° MACHINED VALVE LOCKS
  • Highest quality steel alloy
  • Heat treated and black oxide finished
Part No. Quantity Valve Stem Groove Type Angle Wgt./Pr.
13153-16 16 pr. 8mm (.3135") Standard Single Radius Chevy LS 6.6 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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