I'm looking for any help I can get. I just recently bought some ZR Headers. They are the 4-2-1 setup. The 4 tube is a solid steel piece with no insert for my O2 Sensor. However the 2-1 tube has the insert for the other O2 sensor. I was told I would have to drill a hole in my header and get a bolt insert welded onto it... I don't quite understand why they would sell me a header for my car (98 Honda Accord LX) if it isn't going to work out.

anyone have any information that would/could be useful to me??
I would greatly appreciate it.

Thanks

 

There is absolutely no need to drill a new hole. With your aftermarket header the O2 sensor is simply placed further downstream. You just need an extension for the O2 sensor.

The second O2 sensor has been, and shall still be, located in the catalytic converter.

Whoever told you to drill a new hole has no idea what they're talking about.