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Increase overall airflow through the cooling stack at speed vs thicker offerings
Complete set of exhaust valves
Every piece is engineered for the GV/VA WRX/STI specifically — not adapted from another application
Year Make Model Notes 2015-2021 Subaru WRX FA20DIT — CVT only
For Nostrum's full installation guide please clickHere
Wiseco Piston Set (99.75mm Bore, 8.9:1 Compression) - 2006-2014 Subaru WRX / 2004-2021 Subaru STI PDM_camber-bolts-and-arms Increase overall airflow through theWiseco's pistons outgun cast and Hypereutectic pistons, giving you stronger pistons and tighter tolerances than any other part in your engine, with less internal and external machining. Wiseco's advanced forging process and extensive heat treat and finishing process assure you of the performance and reliability you demand from your high performance engine. Wiseco's pistons outgun cast and Hypereutectic pistons, giving you stronger pistons and tighter
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