Flowmaster introduces our new FlowFX Extreme stainless steel cat-back exhaust system for the 2021 Ford F-150 with the 2.7L, 3.5L and 5.0L engines. This system uses a FlowFX series muffler for a deep powerful sound and increased performance. Learn More: holley-social.com/FlowFXExtreme21FordF150 #FlowMaster #FlowMasterMufflers #FlowMasterEquipped | Flowmaster
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