5.7 Hemi Valve Spring

The Mopar performance valve spring (part number 68277306AA) is engineered for 5.7 Hemi engines, offering a .625" lift. This single spring design is constructed from stronger steel than OEM components, intended for general performance applications and high-lift cam profiles. This part is designated EMS Code 4, meaning it does not require an Executive Order in California and is legal for sale and use nationwide. It is compatible with various Chrysler 300, Dodge Challenger, and Ram models equipped with the 5.7L V8 engine, specifically noted for model years including 2011-2017 and 2009+. According to forum discussions, when using these springs in a 5.7L engine, shims or spacers are not required.