| Part# | DR-425 (Single Spring) |
| Alt Part# | DR-425-16 (Set of 16) |
| Description | PSI Drag Race 1200 & RML Series Dual Valve Spring |
| Outside Diameter | 1.625″ |
| Outer Spring | ID 1.175″ |
| Middle Spring | N/A |
| Inner Spring | ID 0.855″ |
| Install Height | 2.050″ |
| Load at Installed Height | 305 lbs |
| Spring Open Height | 1.150″ |
| Spring Open Load | 865 lbs |
| Recommended Valve Lift | .900″ |
| Spring Rate (lbs/in) | 622 |
| Retainer Step | 0.100″ | Coil Bind (max) | 1.100″ |
PSI DR 425 Dual Racing Valve Springs
$380.00 Set of 16, Free Shipping
PSI Performance Springs DR-425 is a severe duty dual valve spring designed for solid roller valvetrain. Designed for aftermarket cylinder heads with 1.625″ OD Dual Springs.
Type: Dual
Spring OD: 1.625″
Inner ID: .855″
Seat: 305 lbs @ 2.050″
Open: 865 lbs @ 1.150″
Recommended Lift: .900″
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