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SPD Performance Off-Road Axle Dump Dual Exit 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
$750
at Function Factory Performance
typical price

Price tracked 6 times since Jul 26, 2026: low $750, high $750, currently $750.

low $750 · high $750 since Jul 26, 2026
install
3/5 difficulty · n/a
Buy at Function Factory Performance→

where to buy · 2 retailers tracked

  • Function Factory Performancebest pricechecked Aug 26$750view
  • SPD Directchecked Aug 20no price capturedview

A cat-back exhaust replaces everything from the catalytic converter back to the tips. It changes sound and sheds a little weight - it is not a serious power mod on its own.

why this one — The axle-dump design exits the exhaust in front of the rear axle instead of routing all the way to the back bumper, giving a louder, more unfiltered sound - mainly popular for off-road/trail trucks. SPD does not publish a power figure.

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
SPD Performance Catted Downpipe (2.7L EcoBoost)
Price-drop alert for this part

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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.