Pretty easy
This installed pretty good, only thing I would change is the padding because it is hardly sticky
Regular Price: $68.95 - Instant discount: $8.24 = $60.71
AEM No-Weld O2 Sensor Mounts - 2.75 to 3 inch Diameter - Universal Fitment:
If you need to mount an O2 sensor and don't know how to weld or can't find someone who can, this is a permanent solution that replaces a weld in O2 bung. Simply drill a hole in the exhaust, install the gasket, and bolt the clamp. It's that easy to install and all you need to do in order to add a wideband to your car!
Part #: 30-2355-300