02 sensor question

[gmh1234]

I just picked up a Racing Dynamics center muffler on Ebay and there is no 02 sensor hole. Do I need to go to a shop and have a hole put in to accomodate the 02 sensor? Can I run without it?

TIA

[gstuning]

Try and fit the O2 as close to the engine as possible but still getting exhaust from both manifolds

Any shop should be able to install a nut so you can fit your O2