I was thinking of removing the cat from my stock exhaust system. I was wondering if i would run into any problems.

 

no cat is not legal
depending on what state you are in you could get a big fine

 

Just have to deal with the 02 sensors and emissions. If you're running clean enough though you won't have any problems with the 02 sensors. I am taking mine off tomorrow.

 

Its federal law to have a cat pipe and fines can reach $10,000. Just get a high flow one if you think the stock one is restricting power that much.

 

Yeah, forgot to mention that it is illegal.

 

I wouldint recomend it because it's a federal violation. But off road use wont hurt it.

 

Your exhaust will stink bad with no cat... I mean obnoxious like! Do yourself and all of us a favor... Leave it on. You won't notice any difference unless it is plugged. Give your Jeep a nice tune up and you'll notice the difference and feel better about the environment as well.

 

Quote:

Besides being an illegal modification, removal of a catalytic converter is just as likely to decrease horsepower as it is to increase it. It's true that most original equipment converters create enough exhaust system backpressure to adversely affect performance and overall engine efficiency, so a straight pipe in place of a catalytic converter would appear to be the optimum configuration for maximum power. But appearences are often deceiving. Computerized engine management systems are precisely calibrated to deliver optimum performance with an exhaust system that offers some amount backpressure. When backpressure is all but eliminated, air/fuel mixtures can easily become too lean to allow an engine to produce maximum power. Virtually all electronic engine control systems automatically adjust fuel flow to precisely maintain the chemically ideal air/fuel ratio of 14.7:1. However, automatic fuel adjustment only occurs during part throttle operation. Major exhaust system modifications-- such as removal of catalytic converters-- often requires reprogramming of the engine control computer to reestablish optimum air/fuel ratios at wide open throttle.
Each vehicle has its own unique computer controlled air/fuel calibration so each responds somewhat differently to removal of a catalytic converter. Consequently, removal of a converter can result in a performance gain, a performance loss or no change at all. The question is, why contribute to dirty air and risk of a potential fine?

 

Nice repost evil

 

this is an illegal modification. even if its an offroad only rig, it gives the treehuggers more ammo to use against responsible wheelers like the rest of us, which in turn will restrict our access to the legal wheeling areas that are left. there is no good reason to remove it, only bad.