Anyone running withOUT catalytic converters?

[yooformula]

I got a P0420 code so its probably time(180k miles) to replace the cats, but rather than put new ones in I would rather use an off road pipe and tune out the rear o2's. What options are there for these things in terms of aftermarket ypipes?

 

[blueflamed03]

LPPparts makes off road Y's, and if you have a BB tune, Justin can tune out the 02 sensors, so you have no check engine light.

 

[denalianyone]

i have the same code and about to eliminate my cats. Eventually get it tuned to turn off rear o2 sensors.

 

[yooformula]

Thanks for the heads up Blue, what exactly is LPP? My guess is lingenfelter but I didnt find anything on their site for an off-road pipe to fit factory manifolds.

 

[denalianyone]

Lpparts.com

 

[dwmmatt23]

wish i wasnt in california where i have to have my cats. this p0420 code is pissing me off knowing i have to replace both at @$500

 

[odie301]

I run no cats. I have long tube headers and an off road y pipe.. both came from pacesetter. (black bear tuned the rear o2's to be off) The y pipe i bought won't work with factory manifolds. With cash in hand some "old school" exhuast shops will cut out cats and replace them with a chunk of pipe, that would be about all you need to do.

 

[denalianyone]

without the cats do you smell any fuel while driving?

 

[yooformula]

got them done finally but no smell while driving, now sitting at idle thats a different story! at the time, I couldnt find an offroad pipe that would work with factory manifolds(link posted was backordered) so I just had blank pipes welded in place but I did find afterwards, that Jegs sells an o/r pipe for factory manifolds. either way I am glad the clogged cats are gone and its got a bit of a louder sound for now.

 

[denalianyone]

I was going to remove my cats but I replaced the driver side rear o2 sensor in reference to the same code you had. The light went out 2 days later and hasn't come back since.