Need a new catalytic converter for your Honda or Acura? This one's a direct fit for a bunch of models: Honda Pilot (2009-2015), Accord (2008-2017), Odyssey (2008-2019), Ridgeline, Passport, and Acura MDX (2010-2020), RDX, TL, TSX, and others (check the full list in the fitment details). It replaces OEM part numbers like 16643, 16658, 16447, and more. The high-flow design helps reduce backpressure, which can actually improve engine performance and fuel efficiency a bit. It's built to meet federal EPA standards, so it'll keep your emissions in check and hopefully get you through inspection. Important note: This converter is NOT legal for sale or use in California or Colorado, and there are some restrictions in Maine and New York too – so double-check your local laws before buying. Installation is straightforward if you're handy, but a muffler shop can knock it out in no time. Comes with the necessary gasket. A solid, affordable alternative to the dealer part, especially if you're out of warranty and just need a reliable replacement to keep your ride running clean.