14 reactions | 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 | Facebook

These Flowmaster® FlowFX® and Outlaw cat-back exhaust systems are for the 2021-2024 Ford F-150 with the 2.7, 3.5 or 5.0-liter engine. These systems are manufactured using durable 409 stainless steel tubing and are mandrel bent for better exhaust gas flow. FlowFX and Super 10 Series mufflers are used for aggressive to moderate sound levels and maximum performance. Maximum increases on the dyno revealed 18 hp and 20 lb-ft at the rear wheels. These FlowFX cat-back system (718170) uses 4.50-inch bla

1.1K views · 20 reactions | Flowmaster introduces our FlowFX Extreme...