SPD Performance GX Series Single 3" Exit Cat-Back (sound-wave-canceling muffler)
Fits 2015-2020 2.7L EcoBoost · 3.5L EcoBoost
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Price tracked 13 times since Jul 30, 2026 across the stores we check daily: low $750, high $750, currently $750.
where to buy · 2 retailers tracked
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 — SPD does not publish a power figure for this system. The GX Series uses a sound-wave-canceling muffler design meant to sound aggressive without raising cabin drone on the highway.
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.
Estimated from comparable claims: MBRP ~+5 whp; Corsa +12; Flowmaster 11; Flowmaster 18
Questions about this category
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.