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Flowmaster American Thunder Cat-Back

Fits 2015-2020 2.7L EcoBoost · 3.5L EcoBoost

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gain
4-18 hp / 5-18 tq
est. from comparable claims
price
$1,171.95
at Flowmaster Direct
typical price

Price tracked 8 times since Jul 12, 2026: low $1,014.26, high $1,171.95, currently $1,171.95.

low $1,014.26 · high $1,171.95 since Jul 12, 2026
install
2/5 difficulty · n/a - "easy installation," no time stated
Buy at Flowmaster Direct→
also at CJ Pony Parts

where to buy · 2 retailers tracked

  • Flowmaster Directbest pricechecked Aug 19$1,171.95view
  • AmericanTruckschecked Aug 23$1,171.95view

A cat-back exhaust replaces the piping and muffler from the catalytic converter back. Flowmaster's American Thunder line uses their classic chambered-muffler design, known for a deep, old-school American V8-style rumble.

why this one — American Thunder is Flowmaster's classic, moderately aggressive tone - a middle-ground pick if you want the recognizable deep Flowmaster sound without going as loud as their Outlaw line.

Questions about this category

F-150: does anyone publish a horsepower number for a cat-back exhaust?F-150: what does a cat-back exhaust cost?F-150: how hard is it to install a cat-back exhaust, and how long does it take?
pairs well with
cp-e QKspl Catted Downpipe - High Flow (3.5L EcoBoost)
Price-drop alert for this part

One email if this part drops in price at a tracked retailer. Real numbers, no spam, stop anytime.

Gain shown is a no published number, not a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See our affiliate disclosure.