Subaru impreza downpipe?

bell mouth , divorced wastegate openings not make difference. depends on power level going make @ higher power levels, go external wastegate means less @ point. if doing turbo , tuning stock turbo, flat plate kind cheap hks unit make power other type..

iv bought second hand downpipe decat pipe when arrived twin port entry not bell-mouthed make difference bettween power gain or not still decat. allready had cat taken of , model x reg 2000 turbo edition

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