PAC Racing Springs .750 lift LS Extreme Duty Dual Springs, Set of 16, PAC-1529

PAC PAC
SKU #PAC-1529
PAC Racing 1500 Series Small Diameter Dual Spring, Set of 16 - nitrided Nano-Peened
SKU PAC-1529
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PAC Racing Springs Extreme Duty Dual Springs are a severe duty, dual valve spring designed for lightweight valvetrain applications. Direct replacement for most aftermarket cylinder heads with LSx style springs.

This spring can be used in most severe duty hydraulic roller and some solid roller valvetrains and features PAC Racing's patented materials and wire construction.


Part#I.D.
Outer (in)
O.D.
Outer (in)
Inside
Spring
I.D.
(in)
Install
Load
(LB)
Install Height
(in)
Open Load
(LB)
Open Height
(in)
Coil Bind 
Max (in)
Lift Max
(in)
Frequency
Outer 
(CPM)
Frequency
Inner 
(CPM)
DamperQuantity
PAC-15291.2840.90.6301801.9006001.1501.085.7503218534200No1
PAC-15300.9001.2840.6161602.0005801.2501.1800.7502973532947No1
PAC-13350.9001.30.6162501.8008601.0500.9850.8004067944180N/A1
PAC-1237X1.2740.9200 @ 1.800585 @ 1.100550N/APAC-S128N/A1
PAC-1238X1.2740.9250 @ 1.800700 @ 1.050600N/APAC-S128N/A1
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