Crower 85039A Features:

Crower 85039A valve spring shim kit with 1.250 in. OD and 0.815 in. ID dimensions Includes 16 shims in assorted 0.015 in., 0.030 in., and 0.060 in. thicknesses Helps set precise installed valve spring height for proper spring pressure Case-hardened to 45RC surface hardness for severe valvetrain stress resistance

Shims 1.250 X .815 16 Ea. Case-hardened Valve Spring Features:

• 1.250 in. OD and .815 in. ID valve spring shims for precise installed-height adjustment in performance cylinder head setups
• Assorted .015 in., .030 in., and .060 in. thicknesses support accurate valve spring pressure tuning across multiple build combinations
• 16-piece shim kit helps fine-tune spring seat height and simplifies valvetrain geometry correction during engine assembly and service
• Case-hardened to 45RC for wear resistance under severe valvetrain loads and sustained high-rpm operation in racing applications
• Crower high-performance spring shims deliver durable, repeatable valve spring setup control for professional engine builders and DIY rebuilds