All springs that come standard with AFR Cylinder Heads are made of high quality spring wire and are sufficient for most general applications when following the below recommendations. Keep in mind that forced induction, Nitros, high RPM, and even modest RPM with aggressively designed (faster) cam lobes require additional spring pressure and higher quality spring wire. AFR offers various upgrades over standard valve springs; if you’re questioning the spring requirement for your particular application, we advise you contact AFR directly. It is always better to run a higher quality spring than you need, resulting in greater spring life, and more importantly, a higher level of reliability while doing so.
Valve spring pressures may vary plus or minus 5%. It is the customer's responsibility to verify springs are correct for their application.
Break in cam per cam manufacturer's specifications. This can be critical for solid flat tappet cams using AFR spring #8016. Titanium retainers recommended.
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