$478.00 Set of 16, Free Shipping
PSI Performance Springs DR-1247 is a severe duty valve spring designed for solid roller valvetrain. Works with most aftermarket cylinder heads with 1.660″ OD Triple Springs.
Type: Triple
Spring OD: 1.660″
Inner ID: .630″
Seat: 340 lbs @ 2.070″
Open: 940 lbs @ 1.270″
Recommended Lift: .800″
| Part# | DR-1247 (Single Spring) |
| Alt Part# | DR-1247-16 (Set of 16) |
| Description | PSI Drag Race 1200 Series Triple Valve Spring |
| Outside Diameter | 1.660″ |
| Outer Spring | ID 1.195″ |
| Middle Spring | ID .870″ |
| Inner Spring | ID 0.630″ |
| Install Height | 2.070″ |
| Load at Installed Height | 340 lbs |
| Spring Open Height | 1.270″ |
| Spring Open Load | 940 lbs |
| Recommended Valve Lift | 0.800″ |
| Spring Rate (lbs/in) | 750 |
| Retainer Step | 0.100″ | Coil Bind (max) | 1.130″ |
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