Spent about an hour under my car today trying to install the midpipe and highflow cat. Got the old cat and resonator out, and the new one assembled....and then ran into a problem. The O2 sensor after the cat wouldn't come loose from the stock unit.

I didn't want to break it so I had to re-intall the stock system. I think that I am going to buy a new one for the midpipe assembly. If I force this one out i will probably break it and need to buy another one anyway........

Does anyone know how much they cost??

OR

a way to remove the stock one??
Would it come loose if the Cat was hot easier??


Thanks

I think they are in the $175 range. Same thing happened to me. We stripped the threads on the O2 sensor and had to tap the cat for use is I want to reinstall later on.

does the high flow cat and resonator combo make much more noise than the stock cat. I already have a noise problem. what are the torque and horse speced increases?

Originally posted by PHANTOR
does the high flow cat and resonator combo make much more noise than the stock cat. I already have a noise problem. what are the torque and horse speced increases? From what I've read on this board, you will get an increase in noise. Canzoomer found that the the high flow cat needed a resonator because the noise was unbearalbe without. If you happen to have an aftermarket exhaust with the high flow cat and resonator it will be even louder still.

I'll let you know when I get it installed :D

went to the dealership today to get a new O2 sensor. Cost 150$Cdn. They said that it is very common for them to sieze, and that MNA has dropped the price due to this......I'm going to use high temp no sieze when I put on the new one. It's good to 2400F so should work OK. Putting in the midpipe tomorrow