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Reply to "MTH proto sound whats the best upgrade kit"

Yes PS-3 diesel kit support subway.  For PS-3 Diesel you load the full PS-3 sound file and flash code of the model.  You find a subway made in PS-3 that you want.  depending on subway though, you might need to get a smaller diameter, or flatter speaker in 4 ohm than what comes in kit.  You may also need smaller couplers.  All depends on the actual model.  Some had very little room in subway with the interference.  G

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