Cat Back Exhaust System 15- Ford F150 2.7/3.5L

The Cat Back Exhaust System 15- Ford F150 2.7/3.5L from Flowmaster is engineered for 2015–2020 F-150 owners seeking measurable gains in flow efficiency and engine tone without sacrificing reliability or emissions compliance. This cat-back design flows from the catalytic converter rearward, allowing you to upgrade exhaust scavenging while retaining OEM emissions equipment upstream. Built for serious truck enthusiasts and daily-drive mechanics who demand better throttle response and audible performance in a single bolt-on upgrade.

The FlowFX cat-back system features 3-inch diameter tubing throughout, constructed from 409 stainless steel to resist corrosion and withstand high exhaust temperatures in harsh climates. A single-side exit routes exhaust through a 4.5-inch black-coated tip, reducing back pressure and turbulence while delivering a deeper, more muscular tone under load. The mandrel-bent piping maintains consistent diameter through bends—critical for preventing flow restrictions that diminish horsepower recovery. Stainless construction ensures longevity; 409 grade offers proven durability in truck applications where salt exposure and temperature cycling are everyday challenges.

This system is direct-fit for Ford F-150 trucks equipped with 2.7-liter EcoBoost or 3.5-liter naturally aspirated engines from model year 2015 through 2020. Installation requires no cutting or welding—clamp connections and factory-matched mounting points ensure a professional finish in roughly two hours with basic hand tools. Real-world gains include improved fuel economy under cruise, enhanced engine responsiveness during acceleration, and reduced underhood heat. Ideal for owners upgrading from the restrictive stock system who want noticeable results without tuning, custom fab work, or CEL risk.