exhaust cut out on a YJ

[Jeepster05]

Last winter my exhaust pipe snapped at the flange near the manifold and I loved the way it sounded. Unfortunately I didn't have headers and it was freezing cold so I had to repair it. Now that it's summer I want to put on a cut-out to get that good ol grunt back. I found one from Mr. Gasket that I might buy if they have the right size. My question is, will I be doing any harm to my jeep with this mod? Are there any advantages to doing this?

 

[laneiac]

If you make the cut out before the O2 sensor, your jeep will run badly.

 

[Joopin]

My O2 sensor broke off about a year ago when wheelin' (was stock at the time) I still havn't done anything to it and it runs fine. You still shouldn't put the cut out up that far though, I would say right before the cat... some may argue about loosing backpressure, but in my experiance with these that does not come into play. I have yet to do this mod on a jeep though, I will be doing it on mine soon though, when I start putting in a new exhaust. As for advantages, if you look in the Summit Racing catalog, there is a little * next to the cut outs saying "for offroad or racing purposes only" That right there got me to buy them for my old mustang, coolest thing I ever did. However I did get pulled over alot.

 

[Jeepster05]

Well, my jeep is a 90 YJ with a 258 i6 carbuereted so O2 sensor is not a problem and also my cat is long gone.