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HKS Hi-Power 409 catback exhaust for ER34 4-door RB25DET applications is a dedicated muffler option crafted to suit the ER34 sedan with the RB25DET engine. It replaces the stock muffler to alter exhaust tone and outlet behavior while preserving an application-specific fit, offering a correct-match upgrade for ER34 four-door RB25DET owners.
HKS Hi-Power 409 ER34 4dr RB25DET
