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Dec 29, 2025 - 11:33 AM
In simple terms Green Cats = OEM-style, emissions-compliant catalytic converters while “Catted” (non-green) = High-flow performance catalytic converters.
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Dec 29, 2025 - 11:33 AM
View all Kooks 1-7/8" Header and Catted Y-Pipe Kit (2021-2025 F-150) - 1371H420 Questions & Answers