1.8K views · 60 reactions | 1969 Mustang Coupe powered by a 351W breathing through Flowmaster 40 Series mufflers. The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. https://holley-social.com/FlowMaster #FlowMaster #FlowMasterMufflers #FlowMasterEquipped #Flowmaster40Series | Flowmaster | Facebook
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