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The HKS AF Knock Amp 2/3 A/F Sensor references an accessory harness or module pairing that supports air/fuel and knock signal integration with HKS systems. It helps route and condition A/F sensor outputs alongside knock monitoring channels, making signal management cleaner during ECU installation or tuning. A practical option for organizing multiple sensor feeds into HKS electronics.
HKS AF KNOCK AMP 2/3 A/F Sensor
