Flowmaster American Thunder Cat-Back, polished tips

Name: Flowmaster American Thunder Cat-Back, polished tips
Brand: Flowmaster
Price: 749.95 USD
Availability: InStock

Fits 2021-2026 2.7L EcoBoost · 3.5L EcoBoost

Flowmaster American Thunder Cat-Back, polished tips for 2021-2026 Ford F-150 (2.7L EB, 3.5L EB)

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gain

11 hp / 10 tq

manufacturer claim

$ per hp

$95/hp

manufacturer claim · gains don't simply stack

price

$749.95

at eBay

low $1,049.95 · high $1,049.95 since Jul 12, 2026, at the stores we check daily, not eBay

install

2/5 difficulty · n/a

Buy at eBay Add to build

also at Summit Racing

where to buy · 3 retailers tracked

eBaybest pricechecked Oct 10$749.95view
AmericanTruckschecked Sep 14$1,049.95view
Flowmaster Directchecked Oct 3$1,049.95view

also sold on amazon

Buy at Amazon →

Flowmaster's American Thunder cat-back for 2021-2026 trucks, dual 2.5-inch tailpipes with polished tips.

why this one — Flowmaster's own dyno testing claims up to 11 hp and 10 lb-ft at the rear wheels - there's no independent dyno backing that number up, so treat it as the manufacturer's number, not a verified one.

where the number comes from

Flowmaster's own product page: "Maximum dyno gains of 11 HP and 10 LB-FT at the rear wheels." Self-reported by manufacturer, no independent dyno sheet linked. Source: flowmastermufflers.com/products/exhaust/exhaust_systems/cat-back/parts/817979.

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)

Gain shown is a manufacturer claim, not a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.