When high revs, aggressive cam profiles, or extended durability are part of your build plan, Mopar Performance Valve Springs deliver the strength and reliability you need. Designed to meet or exceed the demands of upgraded valvetrains, these springs are engineered to help your engine stay locked in under pressure, heat, and hard running—on the street, strip, or track.

Each spring is made from hardened, high-strength steel or chrome silicon alloy, treated and stress-relieved for long life under load. These performance valve springs maintain seat pressure throughout the rpm range and avoid coil bind during full lift. Whether you’re running stock-style geometry or pushing lift and duration, these springs resist fatigue, valve float, and loss of control that can damage valves, retainers, or heads.

If you're dialing in a 6.4 Hemi Valve Springs upgrade, look for the versions made to support high lift (up to .625 in or more), compatible with O.E. seats, retainers, and locks. No need for exotic modifications—these springs fit well with factory hardware (with a few models specifically tailored for a 6.4 Hemi setup). You get better throttle response, steadier idle, and tighter control under high rpm, with less chance of vibration or loss of lift under load.

Mopar Performance springs come in single or dual configurations depending on how much control your valvetrain needs. Dual springs may offer extra margin for extreme cams, while single springs with dampers give great performance for high-lift street or track builds. For those looking to build or maintain a small block Mopar or any Hemi-powered machine, investing in the right valve springs is a foundational step. Add these springs to your build and benefit from more precise power delivery and reliable performance you can trust.