Kooks 1-7/8-Inch Long Tube Headers with GREEN Catted Y-Pipe
Fits 2021-2026 5.0L V8
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gain
+10-20 whp (est.) hp / +8-15 lb-ft (est.) tq
est. from comparable claims
price
$4,586.11
install
4/5 difficulty
Same idea as the 2015-2020 Kooks header set - bigger, smoother tubes off the engine for better exhaust flow - built for the redesigned 2021+ truck. "Green" catted means the catalytic converters use a faster-light-off core so they clear emissions checks quicker after a cold start.
why this one — Mandrel-bent stainless with CNC-machined flanges for a precise fit, and a limited lifetime warranty on the headers themselves (2-year on the catalytic converters specifically).
Gain shown is a community estimate, not a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See our affiliate disclosure.