Why Do Some Replacement Exhaust Manifolds Come With Catalytic Converters?

2011 Honda Pilot Catalytic Converter Bank 1

Converter catalytic sohc odyssey Epa catalytic converter fits: 2009 2010 2011 2012 honda pilot 3.5l v6

Why do some replacement exhaust manifolds come with catalytic converters? Converter catalytic Catalytic converter 2009 2010 2011 honda pilot 3.5l

Why Do Some Replacement Exhaust Manifolds Come With Catalytic Converters?

Catalytic converters placement manifolds
EPA Catalytic Converter Fits: 2009 2010 2011 2012 Honda Pilot 3.5L V6
EPA Catalytic Converter Fits: 2009 2010 2011 2012 Honda Pilot 3.5L V6

Catalytic Converter 2009 2010 2011 Honda Pilot 3.5L | eBay
Catalytic Converter 2009 2010 2011 Honda Pilot 3.5L | eBay

Why Do Some Replacement Exhaust Manifolds Come With Catalytic Converters?
Why Do Some Replacement Exhaust Manifolds Come With Catalytic Converters?