QualFast .540" Max. Lift High Performance Springs
QualCast
QualFast High Performance Springs are manufactured by the industry-leading high performance valve spring factory using the latest materials and manufacturing processes. All QualFast springs are wound using super-clean chrome silicon or new Alpha 1 or 3 alloy wires. Engineered for high performance to give optimum lift and prevent valve float.
Use with 55-6302 Retainers (sold separately)
See listings below for specifications.
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| Order No. | Description | Price | Quantity | |
| 52-10011 | Max Lift: 0.540" | OD: 1.504" | ID: 1.090" | Closed Load: 90 @ 1.880" | Open Load: 265 @ 1.380" | Spring Type: Single with Damper | Coil Bind : 1.265" | $4.77 | ||
| 52-10012 | Max Lift: 0.540" | OD: 1.494" | ID: 1.080" | Closed Load: 95 @ 1.650" | Open Load: 270 @ 1.200" | Spring Type: Single with Damper | Coil Bind : 1.085" | $4.04 | ||
| 52-16670 | Max Lift: 0.540" | OD: 1.435" | ID: 1.035" | Closed Load: 110 @ 1.700" | Open Load: 300 @ 1.150" | Spring Type: Single with Damper | Coil Bind : 1.100" | $6.87 | ||