Main >> Springs/ Valve >> ISKY Endurance Series


Isky Valve Springs
Iskenderian Produces 3 New "9000 Series" High Performance level springs- High Endurance, Endurance Plus, and Tool Room.


High Endurance Springs are wound from "Super Clean" Chrome Silicone Wire!

Every Part No. Test-Proven 700 Racing Miles
Affordable, Reliable
Durable Performance
First-Ever Endurance Tested Springs
Recommended Maximum 8,000 RPM

Part No. Style Outer OD/ID Inner OD/ID Seat Pressure Open Pressure Max. Lift Price
9315 Dual w/ Damper 1.025
1.550
.740
1.135
210 Lbs.
@1.900"
520 Lbs.
@1.240"
.660" $183
9365 Dual w/ Damper 1.025
1.550
.740
1.135
215 Lbs.
@1.950"
550 Lbs.
@1.270"
.680" $183
9365SP Dual w/ Damper 1.025
1.550
.740
1.135
225 Lbs.
@1.950"
550 Lbs.
@1.270"
.680" $183
9375 Dual w/ Damper 1.040
1.560
.740
1.145
225 Lbs.
@1.970"
550 Lbs.
@1.290"
.680" $247
9375/85 Dual w/ Damper
(Tool Room Outer/Silicon Inner)
1.040
1.560
.740
1.145
250 Lbs.
@1.970"
580 Lbs.
@1.290"
.680" $284
9385 Dual w/ Damper 1.040
1.560
.740
1.145
240 Lbs.
@2.000"
600 Lbs.
@1.280"
.720" $247


Endurance Plus Springs feature the Higher Alloy Outer Spring "Plus" special processing for increased durability!

Every Part No. Test-Proven 850 Racing Miles
Minimal Load Loss
Exceptional Service Life
More Durability For Higher Revving
Recommended Maximum 8,400 RPM

Part No. Style Outer OD/ID Inner OD/ID Seat Pressure Open Pressure Max. Lift Price
9365
Plus
Dual w/ Damper
(Tool Room Outer/Silicon Inner)
1.040
1.560
.740
1.145
235 Lbs.
@1.950"
560 Lbs.
@1.270"
.680" $284
9375
Plus
Dual w/ Damper
(Tool Room Outer/Silicon Inner)
1.040
1.560
.740
1.145
230 Lbs.
@1.970"
560 Lbs.
@1.290"
.680" $284
9375/85
Plus
Dual w/ Damper
(Tool Room Outer/Silicon Inner)
1.040
1.560
.740
1.145
250 Lbs.
@1.970"
580 Lbs.
@1.290"
.680" $284
9385
Plus
Dual w/ Damper
(Tool Room Outer/Silicon Inner)
1.040
1.560
.740
1.145
245 Lbs.
@2.000"
600 Lbs.
@1.280"
.720" $284


Tool Room Springs feature the Highest Quality Alloy Wire and trade secret endurance processing. They're indefatigable!

Every Part No. Test-Proven 1,000 Racing Miles
Near-Zero Load Loss
Absolute Maximum Endurance
Gold Standard Test Certification
World's Finest Racing Springs
Recommended Maximum 8,800 RPM

Part No. Style Outer OD/ID Inner OD/ID Seat Pressure Open Pressure Max. Lift Type of Cam Price
9915 Dual w/ Damper 1.560"
1.145"
1.040"
.740"
195 Lbs @1.975" 540 Lbs @1.275" .700" "Winston Cup"
Flat Tappet
$513
9935 Dual Damperless 1.560"
1.155"
1.153"
.820"
245 Lbs
@1.950"
590 Lbs. @1.250" .700" Roller $437
9945 Dual w/ Damper 1.625"
1.175"
1.065"
.770"
250 Lbs @2.020" 675 Lbs. @1.270" .750" Roller $437
9965 Dual w/ Damper 1.560"
1.145"
1.040"
.740"
245 Lbs @1.950" 585 Lbs @1.270" .680" Roller $437
9975 Dual w/ Damper 1.560"
1.145"
1.040"
.740"
245 Lbs @1.970" 585 Lbs @1.290" .680" Roller $437
9985 Dual w/ Damper 1.560"
1.145"
1.040"
.740"
245 Lbs
@2.000"
600 Lbs @1.300" .700" Roller $437