Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Manley Performance

Manley Performance

Manley NexTek Valve Springs 221431-1 SPRING-1.311 SINGLE HEMI

SKU: MAN221431-1

Valve Springs
Manley NexTek Valve Springs 221431-1 SPRING-1.311 SINGLE HEMI
Manley Performance

Manley Performance

Manley NexTek Valve Springs 221431-1 SPRING-1.311 SINGLE HEMI

SKU: MAN221431-1

Valve Springs
A$68.47
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
View cart 0
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

These Manley NexTek valve springs are better-designed valve springs using state-of-the-art machinery for purpose-built racing engines. They're manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature a proprietary, multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. The Manley NexTek valve springs are smaller diameter and lightweight, allowing engines to rev higher faster. They have an extended tip thickness designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading.

Part Type

Valve Springs

Data: v4.2 - Upd: 2026-10-14 10:06:33

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
221431-1
Product Attributes - Part Type
Valve Springs
Product Attributes - Product Line
Manley NexTek Valve Springs
Product Attributes - UPC
807298061139
Product Attributes - Valve Spring Style
Beehive
Product Attributes - Number of Springs Per Valve
Single
Product Attributes - Maximum Valve Lift (in.)
0.650 in.
Product Attributes - Retainers Included
No
Product Attributes - Outside Diameter of Outer Spring (in.)
1.311 in.
Product Attributes - Coil Bind Height (in.)
1.100 in.
Product Attributes - Damper Spring Included
No
Product Attributes - Spring Rate (lbs./in.)
353 lbs./in.
Product Attributes - Inside Diameter of Outer Spring (in.)
0.885 in.
Product Attributes - Locks Included
No
Product Attributes - Valve Stem Seals Included
No
Product Attributes - Valve Springs Coated
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man221431-1
SFX Item ID 4932368
Supplier Item Code 4932368
Manufacturer SKU 221431-1
Manufacturer UPC 807298061139
Alternative References SPRING-1.311

Compatibility

Application Data
  • MakeCHRYSLER
    Beginning Year2005
    Ending Year2010
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size6.1L/370
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeCHRYSLER
    Beginning Year2005
    Ending Year2021
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size5.7L/345
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeDODGE
    Beginning Year2003
    Ending Year2021
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size5.7L/345
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeDODGE
    Beginning Year2006
    Ending Year2010
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size6.1L/370
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeJEEP
    Beginning Year2005
    Ending Year2021
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size5.7L/345
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeJEEP
    Beginning Year2006
    Ending Year2010
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size6.1L/370
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.
  • MakeRAM
    Beginning Year2011
    Ending Year2021
    Engine TypeV8
    Engine FamilyMopar Hemi Gen III
    Engine Size5.7L/345
    Installed Height (in.)1.811 in.
    Seat Pressure at Installed Height (lbs.)146 lbs.
    Open Height (in.)(application)1.161
    Open Pressure (lbs.)371 lbs.

Loading compatibility information...

Keep shopping

More from Manley Performance