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The Absolute Best Valve Springs in Drag Racing Today... Now Available from Isky!

We are proud to announce that Isky has recently been appointed a Distributor for PSI Sportsman Drag Race Valve Springs.

You can trust PSI (Performance Springs Inc.) Valve Springs to out-perform all others because they are exclusively 100% American Made using the finest materials, the best CNC Equipment and state-of-the-art trade secret processing.

Don't settle for those foreign-made springs of lesser quality. Insist on genuine PSI Drag Race Valve Springs and get into the winners circle!

Isky stocks the following PSI part numbers.
*Note: 1200 Series Springs utilize special Heat Treating and additional "Special Processing" for minimal load loss.

PSI Valve Springs Specifications

(Toleraince = +/- .005) (Load Tolerance = +/- 3%)
ID
 Part
No.
Type OD Outer Middle Inner Seat
Pressure
Open
Pressure
Rate
per in.
Max
Net
Lift
Coil
Bind
1000 SERIES
1047 Triple 1.660" 1.195" .870" .630" 300 lbs
@2.070"
900 lbs
@1.270"
750 .800" 1.130"
1048 Triple 1.660" 1.195" .870" .630" 338 lbs
@2.100"
1002 lbs
@1.200"
738 .900" 1.130"
1200 SERIES
1224 Dual 1.625" 1.175" N/A .855" 275 lbs
@2.000"
750 lbs
@1.200"
594 .800" 1.130"
1246 Triple 1.645" 1.195" .870" .630" 300 lbs
@2.000"
890 lbs
@1.200"
738 .800" 1.100"
1247 Triple 1.660" 1.195" .870" .630" 340 lbs
@2.070"
940 lbs
@1.270"
750 .800" 1.130"
1248 Triple 1.660" 1.195" .870" .630" 375 lbs
@2.100"
1045 lbs
@1.200"
744 .900" 1.130"
1249 Triple 1.660" 1.195" .870" .630" 385 lbs
@2.200"
1110 lbs
@1.200"
725 1.000" 1.130"
1250 Triple 1.660" 1.195" .870" .630" 395 lbs
@2.250"
1478 lbs
@1.200"
746 1.050" 1.130"
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