QualFast .550" 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.

See listings below for specifications.

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Order No. Description Price Quantity
52-65000 Max Lift: 0.550" | OD: 1.289T | ID: 0.880" | Closed Load: 105 @ 1.800" | Open Load: 260 @ 1.200 | Spring Type: Conical | Coil Bind: 1.140" | Use Retainers: 55-6103 or 55-8103 | Application: Chevy LS $8.20
52-65900 Max Lift: 0.550" | OD: 1.050T | ID: 0.636" | Closed Load: 80 @ 1.640" | Open Load: 185 @ 1.090"| Spring Type: Conical | Coild Bind: 0.952" |Use Retainers: 55-6194 | Application: Ford 4.6L, 2V Ovate $15.88
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