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. |
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| 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 Without Damper Ovate Wire |
|
| 221423-16 |
SBC LS-1 / L-98
Street / Strip Applications |
.575" |
1.255" |
.830" |
115 @ 1.750"
350 @ 1.175" |
409 |
1.100" |
23631-16 |
23632-16
23633-16 (+.050) |
|
| Stock Diameter Single Conical Ovate Wire |
|
| 221428-16 |
SBC LS-1 / 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) |
|
| 221438-16 |
SBC LS-1/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-1,
High Performance Street / Strip |
.660" |
1.295" |
.676" |
155 @ 1.810
405 @ 1.150 |
379 |
1.100" |
23621-16 |
23623-16 |
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| 7° TITIANIUM & STEEL RETAINERS |
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Valve Stem
Diameter |
|
Dimensions |
|
| Part # |
Quantity |
Spring |
Degree |
A |
B |
C |
Height |
Valve Locks |
|
| 7° Titanium |
|
23632-16
23633-16 |
16 pcs. |
221423-16 |
.3133"/.3136" |
7º |
1.155" |
.825" |
--- |
Stock
+.050" |
13098-16 |
|
23622-16
23625-16 |
16 pcs. |
221428-16 |
.3133"/.3136" |
7º |
.935" |
.640" |
--- |
Stock
+.050" |
13098-16 |
|
| 23623-16 |
16 pcs. |
221436-16 |
.3133"/.3136" |
7º |
1.155" |
.950" |
.675" |
Stock |
13098-16 |
|
| 7° Steel |
|
| 23631-16 |
16 pcs. |
221423-16 |
.3133"/.3136" |
7º |
1.155" |
.825" |
--- |
Stock |
13098-16 |
|
| 23620-16 |
16 pcs. |
221428-16 |
.3133"/.3136" |
7º |
.935" |
.640" |
--- |
Stock |
13098-16 |
|
| 23621-16 |
16 pcs. |
221436-16 |
.3133"/.3136" |
7º |
1.155" |
.950" |
.675" |
+.050" |
13098-16 |
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| 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 LocŪ Chevy LS-1 |
7º |
2.6 gms |
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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. |
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| Part No. |
Quantity |
Description |
Minimum Tip |
Type |
Thickness |
|
| 42125-8 |
8 pcs. |
.3130" stem valves (8 mm) |
.130" |
Standard |
.080" |
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