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Manley Performance

Manley Performance

Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit

SKU: MAN26362134KS

Valve Springs

MAN Valve Spring Kits

Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit
Manley Performance

Manley Performance

Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit

SKU: MAN26362134KS

Valve Springs

MAN Valve Spring Kits

A$810.00
LAST ONE! Est Ship 4-7 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Manley Performance LS & LT NexTek® valve spring kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs provide exceptional fatigue resistance and high-tensile strength, ensuring consistent valve control at extreme RPMs. Save time and money with these all-inclusive kits, featuring premium springs, retainers, I.D. locators, locks, and Viton? seals.

Product Overview

Manley Performance LS & LT NexTek® valve spring kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs provide exceptional fatigue resistance and high-tensile strength, ensuring consistent valve control at extreme RPMs. Save time and money with these all-inclusive kits, featuring premium springs, retainers, I.D. locators, locks, and Viton? seals.


Features and Benefits

  • Manley LS and LT Valve Spring Kits provide a complete, engineered solution, ensuring seamless compatibility for higher-lift camshafts and eliminating concerns with mismatched components.
  • NexTek Valve Springs are manufactured from "super clean" Hi-Tensile Chrome Silicon steel and shot-peened to MIL spec for maximum fatigue life. Spring No. 221436-16
  • 7 Steel Retainer CNC machined to exacting tolerances and made of thru-hardened 4140 chromoly. Retainer No. 23621-16 (+.050" Installed Height)
  • I.D. Valve Spring Locator is CNC machined, heat treated, and black oxide finished. Locator No. 42334-16 (.505" ID)
  • 7 Machined Valve Locks use the highest quality steel alloy and are heat treated and black oxide finished. For 8mm (.3135") valve stem. Lock No. 13098-16
  • Viton Valve Stem Seals offer exceptional resistance to heat, chemicals, and oils. Seal No. 24042-16
  • Note: Max. lift figures above may vary depending upon the cylinder head and installed height.

Product Details

Description:Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit
Engine Type:ICE
Engine:LS
Finish:Fully Polished
Installed Pressure and Height:155 @ 1.810
Make:Chevrolet
Open Pressure and Height:405 @ 1.150
Part Number:man26362134KS
Product Type:Valve Spring Kit
Title:Manley Valve Spring Kit - Chevrolet LS - NexTek? Springs/Steel Retainers/I.D. Locators/Machined Valve Locks/Viton Seals
Valve Lift - Maximum:.660
Valve Lock Angle:7
Valve Spring Coil Bind Height:1.100
Valve Spring Inner Diameter:.676
Valve Spring Outer Diameter:1.295
Valve Spring Quantity:16
Valve Spring Rate:379
Valve Spring Series:NexTek?
Valve Spring Type:Double Without Damper
Weight:93

Part Type

Engine Valve Spring Kit

Data: v4.2 - Upd: 2026-09-29 07:59:54

Features

  • 7 Machined Valve Locks use the highest quality steel alloy and are heat treated and black oxide finished. For 8mm (.3135") valve stem. Lock No. 13098-16
  • 7 Steel Retainer CNC machined to exacting tolerances and made of thru-hardened 4140 chromoly. Retainer No. 23621-16 (+.050" Installed Height)
  • I.D. Valve Spring Locator is CNC machined, heat treated, and black oxide finished. Locator No. 42334-16 (.505" ID)
  • Manley LS and LT Valve Spring Kits provide a complete, engineered solution, ensuring seamless compatibility for higher-lift camshafts and eliminating concerns with mismatched components.
  • NexTek Valve Springs are manufactured from "super clean" Hi-Tensile Chrome Silicon steel and shot-peened to MIL spec for maximum fatigue life. Spring No. 221436-16
  • Note: Max. lift figures above may vary depending upon the cylinder head and installed height.
  • Viton Valve Stem Seals offer exceptional resistance to heat, chemicals, and oils. Seal No. 24042-16

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
26362134KS
Product Attributes - Part Type
Valve Springs
Product Attributes - Product Line
Manley NexTek Valve Spring and Retainer Kits
Product Attributes - UPC
807298102344
Product Attributes - Valve Spring Style
Standard
Product Attributes - Number of Springs Per Valve
Dual
Product Attributes - Maximum Valve Lift (in.)
0.660 in.
Product Attributes - Retainers Included
Yes
Product Attributes - Retainer Material
Steel
Product Attributes - Outside Diameter of Outer Spring (in.)
1.295 in.
Product Attributes - Coil Bind Height (in.)
1.100 in.
Product Attributes - Damper Spring Included
No
Product Attributes - Spring Rate (lbs./in.)
379 lbs./in.
Product Attributes - Inside Diameter of Outer Spring (in.)
0.949 in.
Product Attributes - Inside Diameter of Inner Spring (in.)
0.676 in.
Product Attributes - Locks Included
Yes
Product Attributes - Lock Material
Steel
Product Attributes - Lock Groove Quantity
2-groove
Product Attributes - Lock Style
7 degree
Product Attributes - Valve Stem Seals Included
Yes
Product Attributes - Valve Springs Coated
No
Product Attributes - Valve Stem Diameter (mm)
8.00mm
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Make
CHEVROLET
Product Attributes - Engine Family
Chevy small block Gen III/IV (LS-based engines)
Product Attributes - Installed Height (in.)
1.810 in.
Product Attributes - Seat Pressure at Installed Height (lbs.)
155 lbs.
Product Attributes - Open Height (in.)(application)
1.150
Product Attributes - Open Pressure (lbs.)
405 lbs.
Product Attributes - Remanufactured
No

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man26362134KS
SFX Item ID 4059957
Supplier Item Code 4059957
Manufacturer SKU 26362134KS
Manufacturer UPC 807298102344
Alternative References .660in

Compatibility

Application Data
  • Beginning Year1997
    Ending Year2004
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size5.7L/350
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.
  • Beginning Year1999
    Ending Year2014
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size5.3L/325
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.
  • Beginning Year1999
    Ending Year2017
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size4.8L/294
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.
  • Beginning Year1999
    Ending Year2019
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size6.0L/364
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.
  • Beginning Year2006
    Ending Year2015
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size7.0L/427
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.
  • Beginning Year2008
    Ending Year2017
    Engine FamilyCHEVY SMALL BLOCK GEN III/IV LS V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    Installed Height (in.)1.810 in.
    MakeCHEVROLET
    Open Height (in.)(application)1.150
    Open Pressure (lbs.)405 lbs.
    Seat Pressure at Installed Height (lbs.)155 lbs.

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