SKU: 221439-16 | UPC: 807298023427
Manley Chrysler Hemi 6.4L NexTek Series High Performance Valve Springs .650 Max Lift (2011-2023)
Manley NexTek Series valve springs deliver reliable valvetrain control for Chrysler 6.4L Hemi engines with up to .650 max lift cams. This set of 16 beehive springs with chromoly retainers fits 2011-2023 Dodge Challenger Charger Chrysler 300 Jeep Grand Cherokee SRT and Ram 2500/3500 models. They maintain stability at high RPM to support increased power and prevent valve float.
Key Features
- Beehive Design: Lowers overall mass reduces harmonics and improves high RPM durability
- .650 Max Lift: Clears aggressive cam profiles without coil bind down to 1.090 installed height
- Seat Pressure: 155 lbs at 1.780 height for firm control and consistent sealing
- Open Pressure: 415 lbs at .650 lift handles high boost and RPM loads
- Spring Rate: 140 lbs/in provides precise valve timing across the RPM range
Product Notes
- Set includes 16 springs and matching chromoly steel retainers for complete valvetrain upgrade
- Built from chrome silicon vanadium alloy steel for heat resistance and fatigue life
- Packaged for protection during shipping weighs 5.1 lbs box 14 x 14 x 4 inches
Installation Notes
- Professional installation recommended.
- Verify installed height 1.780 check retainer seal and coil bind clearances
- Pair with 10 degree steel locks for secure valve retention
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011-2023 | Dodge | Challenger | 6.4L V8 |
| 2011-2023 | Dodge | Charger | 6.4L V8 |
| 2012-2023 | Chrysler | 300 | 6.4L V8 |
| 2012-2021 | Jeep | Grand Cherokee | SRT 6.4L |
| 2014-2023 | Ram | 2500 | 6.4L V8 |
| 2014-2023 | Ram | 3500 | 6.4L V8 |
Why Choose Manley?
- Decades of experience supplying valvetrain parts to racers and builders
- Strict quality control with dyno tested designs for real world performance
- Direct fit engineering matches OEM specs while handling extreme conditions
Frequently Asked Questions
-
Q: Which 6.4L Hemi models does this fit?
A: Fits 2011-2023 Dodge Challenger Charger 2012-2023 Chrysler 300 2012-2021 Jeep Grand Cherokee SRT and 2014-2023 Ram 2500/3500 all 6.4L V8 -
Q: What materials are used in these springs?
A: Heat treated chrome silicon vanadium steel springs paired with strong chromoly steel retainers for longevity under high stress -
Q: What installation steps are needed?
A: Professional setup advised measure spring heights pressures and clearances use matching locks for optimal valvetrain function
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box 14 x 14 x 4 inches
- Weight: 5.1 lbs
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