Flowmaster Outlaw Cat-Back, single side exit

Fits 2015-2020 2.7L EcoBoost · 3.5L EcoBoost

Flowmaster Outlaw Cat-Back, single side exit for 2015-2020 Ford F-150 (2.7L EB, 3.5L EB)

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gain
4-18 hp / 5-18 tq
estimate, based on similar parts' claims
price
$879.95
at Flowmaster Direct
about its usual price

Price tracked 13 times since Jul 12, 2026 across the stores we check daily: low $879.95, high $1,024.95, currently $879.95.

low $879.95 · high $1,024.95 since Jul 12, 2026, across the stores we check daily
install
2/5 difficulty · n/a

A cat-back exhaust replaces the piping and muffler from the catalytic converter back, exiting through a single pipe on one side.

why this one — Same aggressive Outlaw tuning, in a single side-exit layout - typically a more affordable option than the dual-exit Outlaw.

where the number comes from

No manufacturer or independent dyno figure found for this specific product. Cat-backs on turbo trucks with a downpipe/tune doing the real work typically carry no standalone gain claim; sound/tone is the primary value prop.

how we estimated it

Estimated from comparable claims: MBRP ~+5 whp; Corsa +12; Flowmaster 11; Flowmaster 18

Questions about this category

Price-drop alert for this part

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No published gain figure for this part, and nothing here is 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.

Independent site. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer, parts manufacturer, or retailer named on this site. Vehicle and brand names are used only to describe compatibility. Gains shown are manufacturer claims, community estimates, or independent tests, labeled by source on every part, and are not guarantees.