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sptSPRK-TS1015-SU1-ST
Supertech Subaru EJ20/25 70lbs/35.5mm Dual Valve Spring Kit (w/Steel Retainers)
sptSPRK-TS1015-IN-SU4
Supertech Subaru EJ25 Dual Valve Spring Kit
sptSPRK-TS1015-SU6
Supertech Subaru EZ30 (1st Gen) Dual Valve Spring Kit
sptSPRK-SUEZ30-W
Supertech Subaru EZ30 (w/Variable Intake Lift) Dual Valve Spring Kit
sptSPRK-TS1015-SU3
Supertech Subaru WRX/STi 16V Dual Valve Spring Kit
sptSPRK-TS1015-BE-SU1
Supertech Subaru WRX/STi 16V Single Beehive Valve Spring Kit