Looking to upgrade or modify your Subaru WRX STI with aftermarket parts from GSC Power Division? At Tunersports.com we carry a great selection of their parts for your vehicle.
From engine components, camshafts, engine components or valves we have 16 parts available for your WRX STI, all with free shipping to the Continental US 48 States.
For more information on GSC Power Division, you can visit the official GSC Power Division website.

OUT OF STOCK GSC Power Division Billet S1 Camshaft Kits 7026S1GSC P-D Subaru EJ257 w/Dual AVCS S1 Cams 266/264 Billet $1,058.68
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OUT OF STOCK GSC Power Division Billet S2 Camshaft Kits 7026S2GSC P-D 2008+ Subaru STi (EJ257 w/Dual AVCS) S2 Cams 272/272 Billet $1,058.68
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IN STOCK GSC Power Division OEM Valve Seat Sets 1005GSC P-D Valve Seat Set OEM Replacement EJ205/EJ207/EJ257 $45.63
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OUT OF STOCK GSC Power Division Exhaust Valve Guide Sets 3025-8GSC P-D EJ Series EJ205/EJ207/EJ258 Manganese Bronze Exhaust Valve Guide Stopper Style - Set 8 $70.28
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OUT OF STOCK GSC Power Division Exhaust Valve Guide Sets 3027-8GSC P-D EJ Series EJ205/EJ207/EJ262 Manganese Bronze Exhaust Valve Guide Traditional - Set 8 $70.28
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IN STOCK GSC Power Division Intake Valve Guide Sets 3026-8GSC P-D EJ Series EJ205/EJ207/EJ260 Manganese Bronze Intake Valve Guide Stopper Style - Set 8 $70.28
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IN STOCK GSC Power Division Intake Valve Guide Sets 3028-8GSC P-D EJ Series EJ205/EJ207/EJ264 Manganese Bronze Intake Valve Guide Traditional - Set 8 $70.28
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IN STOCK GSC Power Division Valve Spring Sets 5743GSC P-D Subaru EJ Turbo DOHC Valve Spring & Ti Retainer Kit $282.46
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IN STOCK GSC Power Division Valve Stem Seal Sets 1022GSC P-D Subaru EJ257/EJ207/EJ205 Viton 6mm Valve Stem Seal Set $41.17
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IN STOCK GSC Power Division Intake Valves +1mm 2014-01GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single $44.79
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IN STOCK GSC Power Division Valve Stem Seal Sets 1022GSC P-D Subaru EJ257/EJ207/EJ205 Viton 6mm Valve Stem Seal Set $41.17
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IN STOCK GSC Power Division Intake Valves -STD 2012-01GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - Single $44.67
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IN STOCK GSC Power Division OEM Valve Seat Sets 1005GSC P-D Valve Seat Set OEM Replacement EJ205/EJ207/EJ257 $45.63
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IN STOCK GSC Power Division Valve Spring Sets 5743GSC P-D Subaru EJ Turbo DOHC Valve Spring & Ti Retainer Kit $282.46
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IN STOCK GSC Power Division Valve Spring Kits 5043GSC P-D Subaru EJ257 Beehive Valve Spring & Ti Retainer Kit (Use w/OE Spring Seats) $399.92
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IN STOCK GSC Power Division Intake Valves +1mm 2014-01GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single $44.79
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IN STOCK GSC Power Division Exhaust Valves -STD 2015-01GSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD) $59.60
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IN STOCK GSC Power Division Intake Valve Guide Sets 3028-8GSC P-D EJ Series EJ205/EJ207/EJ264 Manganese Bronze Intake Valve Guide Traditional - Set 8 $70.28
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IN STOCK GSC Power Division Exhaust Valves +1mm 2017-01GSC P-D Subaru EJ20/EJ257 Turbo Chrome Polished Super Alloy Exhaust Valve - 33mm Head (+1mm) -Single $59.99
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IN STOCK GSC Power Division Exhaust Valves -STD 2011-01GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 32mm Head (STD) - Single $44.72
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