What will I need to do if I cut out the cats on a 99 cobra. The car really seems to wake up with-out them but of course I get the check engine light. Will the O2 elliminators really work? Or what would be the best course to take?

 

Yes the O2 eliminators work.

Just cut them off at the welds and weld in a piece of exhaust piping.

 

Will all four have to be replaced or just the fronts?

 

I am actually not sure about that. I'm pretty sure all 4 should be replaced. But you might wanna wait until someone else chimes in that knows for sure.

 

i bought a set of eleminators for mine when i took my cats out and they didnt work. but i know people with them that do work. so if you get them hopefully you will be one of the lucky ones

 

you only need to replace the rear ones.

 

Did you ever get your light to go out after the eliminators didn't work?

 

buying a new midpipe would be so much easier.