PSI Dual Valve Springs

PSI DR 1257 RML Dual Racing Valve Springs

$610.00 Set of 16, Free Shipping

PSI Performance Springs DR-1257-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 1.570″ OD Dual Springs.

Type: Dual
Spring OD: 1.570″
Inner ID: .745″
Seat: 410 lbs @ 2.150″
Open: 1260 lbs @ 1.300″
Recommended Lift: .850″

SKU: PSI-DR-1257-RML-16 Category: Tags: , , ,

Coil Bind (max)1.140″

Part#DR-1257-RML (Single Spring)
Alt Part#DR-1257-RML-16 (Set of 16)
DescriptionPSI Drag Race 1200 & RML Series Dual Valve Spring
Outside Diameter1.570″
Outer SpringID 1.070″
Middle SpringN/A
Inner SpringID 0.745″
Install Height2.150″
Load at Installed Height410 lbs
Spring Open Height1.300″
Spring Open Load1260 lbs
Recommended Valve Lift.850″
Spring Rate (lbs/in)1000
Retainer Step0.100″

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