PSI Dual Valve Springs

PSI DR 428 RML Dual Racing Valve Springs

$460.00 Set of 16, Free Shipping

PSI Performance Springs DR-428-RML is a severe duty dual valve spring designed for solid roller valvetrain with added features. This model includes the special RML high strength materials for extended load retention and Max Life (ML) multi-step surface enhancement process to increase spring endurance. Designed for aftermarket cylinder heads with 1.300″ OD Dual Springs.

Type: Dual
Spring OD: 1.300″
Inner ID: .648″
Seat: 215 lbs @ 1.850″
Open: 674 lbs @ 1.100″
Recommended Lift: .750″

SKU: PSI-DR-428-RML-16 Category: Tags: , , ,

Coil Bind (max)1.050″

Part# DR-428-RML (Single Spring)
Alt Part# DR-428-RML-16 (Set of 16)
Description PSI Drag Race 1200 & RML Series Dual Valve Spring
Outside Diameter 1.300″
Outer Spring ID .898″
Middle Spring N/A
Inner Spring ID 0.648″
Install Height 1.850″
Load at Installed Height 215 lbs
Spring Open Height 1.100″
Spring Open Load 674 lbs
Recommended Valve Lift .750″
Spring Rate (lbs/in) 674

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