1.8K views · 59 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

1.2K views | We are excited to announce that fitment of our FlowFX, American Thunder, and Outlaw Cat-back and Axle-back systems for '15+ Mustangs with 2.3L/3.7L engines will continue into the 2018 model year for EcoBoost models. | Flowmaster | Facebook