you need another place in the exaust
it doesn't replace the oe one.
and yes it's a great wideband, some say that it's slower to "react" than other.
but for what we do it's not really an issue.
maybe check with that guy
Heintz Motorsports [email@example.com]
he's able to have them cheaper and shipping will be less than ebay also.
but it's from usa