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Beefed up inner rim flange
or drift cars
Fully nitrated ( this includes the 45 which increases valve life and makes a better seal at the valve seat for improved cylinder pressure) also reduces carbon buildup on the backside of the valve
Year Make Model Notes 2006-2014 Subaru WRX EJ20/EJ25 series 2004-2021 Subaru WRX STI EJ207/EJ257 2004-2013 Subaru Forester XT EJ255
Drop-in OEM airbox replacement
HKS Suction Return Kit for HKS Intake - 2020-2024 Toyota Supra PDM_fuel-lines-and-fittings Beefed up inner rim flangeHKS Suction Return Kit for HKS Intake 2020 2024 Toyota Supra Sequential Suction Valve Technology The HKS Super SQV (Sequential Suction Valve) is developed through HKS's turbocharger engineering program a company that builds complete turbo kits understands what happens at the compressor inlet. The SQV4 uses a sequential valve mechanism that provides smooth boost response across the full pressure range, protecting the compressor wheel from surge and