Supertech Valve Spring and Titanium Retainer Kit for Subaru WRX EJ20 & WRX STi EJ25 Turbocharged Engines

Set of 16 Valve Springs, 16 Titanium Retainers & Seats

SPRK-TS1015-SU3
Type: Dual Spring
Outer Spring: OD 27.50mm - ID 20.00mm
Inner Spring: OD 20.00mm - ID 15.20mm
Press.Seat: 64lbs @ 35.60mm
Max Lift: 15.30mm
Coil Bind: 20.70mm
Rate: 12.10mm
Retainer: RET-TS60/WRX1
Spring: SPR-TS1015
Seat: SEAT-TS/SUB3

SPRK-TS1015-SU1
Type: Dual Spring
Outer Spring: OD 27.50mm - ID 20.00mm
Inner Spring: OD 20.00mm - ID 15.20mm
Press.Seat: 70lbs @ 35.00mm
Max Lift: 14.80mm
Coil Bind: 20.70mm
Rate: 12.10mm
Retainer: RET-TS60/WRX1
Spring: SPR-TS1015
Seat: SEAT-TS/SUB

SPRK-TS1015-SU4
Type: Dual Spring
Outer Spring: OD 27.50mm - ID 20.00mm
Inner Spring: OD 20.00mm - ID 15.20mm
Press.Seat: 82lbs @ 33.80mm
Max Lift: 13.50mm
Coil Bind: 20.70mm
Rate: 12.10mm
Retainer: RET-TS60/WRX1
Spring: SPR-TS1015
Seat: SEAT-TS/SUB4

SPRK-TS1015-IN-SU4
Type: Dual Spring
Outer Spring: OD 27.50mm - ID 20.00mm
Inner Spring: OD 20.00mm - ID 15.20mm
Press.Seat: 100lbs @ 33.80mm
Max Lift: 13.50mm
Coil Bind: 20.70mm
Rate: 14.90mm
Retainer: RET-TS60IN2/WRX1
Spring: SPR-TS1015
Seat: SEAT-TS/SUB4

SPRK-TS1015-BE-SU3
Outer Spring: OD 27.70mm - ID 19.70mm
Inner Spring: OD 23.20mm - ID 15.20mm
Press.Seat: 65lbs @ 35.60mm
Max Lift: 14.20mm
Coil Bind: 21.80mm
Rate: 12.70mm
Retainer: RET-TS60/WRX-BE
Spring: SPR-TS1015-BE
Seat: SEAT-TS/SUB3

SPRK-TS1015-BE-SU1
Outer Spring: OD 27.70mm - ID 19.70mm
Inner Spring: OD 23.20mm - ID 15.20mm
Press.Seat: 70lbs @ 35.00mm
Max Lift: 12.50mm
Coil Bind: 21.80mm
Rate: 12.70mm
Retainer: RET-TS60/WRX-BE
Spring: SPR-TS1015-BE
Seat: SEAT-TS/SUB

SPRK-TS1015-BE-SU4
Outer Spring: OD 27.70mm - ID 19.70mm
Inner Spring: OD 23.20mm - ID 15.20mm
Press.Seat: 85lbs @ 33.40mm
Max Lift: 11.50mm
Coil Bind: 21.80mm
Rate: 12.70mm
Retainer: RET-TS60/WRX-BE
Spring: SPR-TS1015-BE
Seat: SEAT-TS/SUB4

Our valve springs are computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue. We also utilize computer software that allows us to ensure that the harmonics are under control. All Supertech valve springs are made with premium super clean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms. Using high quality steel alloy also provides the added benefit of better structural memory for all of our springs, giving your performance racing engine a serious competitive advantage.

Supertech retainers are manufactured with high quality military certified Titanium alloy, and are CNC machined for a tight fit. Our high quality retainers are among the best in the industry.