Was wondering about this. I did some research and saw mixed opinions. Check engine light will come on? How bad will it hurt performance? Im pretty much stock.

 

As far as power gains or losses I wasnt worried about that. I gutted mine so I would be able to run high octane race gas. Seems like cheap insurance to me. Ive had my cats done for a week and haven't gotten a check engine light yet, dont know why but it hasnt came on.

 

If your running stock boost levels and still have a stock convertor? I'm not to sure you'd gain much except make it louder. You'll loose a little torque down low but gain a little on the top end. And like I said with 8-10psi I'm thinking you really would'nt gain much of anything.

Rich

 

If your pretty much stock i dont see why you would wanna gut the cats.I dont think youll lose any power but you wont gain any either.The only gains would probably be with a highly modded setup.I also dont see why the check engine light should come on.If sound is what your after you should sell your catback,get a pair of glasspacks ($50.00)and take the money and get some more mods like a pulley.The sound from glasspacks is awsome!Leave the cats be.

 

because unless the rear O2 sensors are turned off with a chip, the computer would know the cats are not working properly

 

[QUOTE]Originally posted by brain bypass
because unless the rear O2 sensors are turned off with a chip, the computer would know the cats are not working properly [/QUOTE

But dont the o2s measure air fuel .How would no cats change your air fuel?

 

The cats heat the exhaust stream and chemicaly change it's makeup. The rear O2s will know.

Rich

 

You have to have an O2 simulator hooked up for the rear sensors

 

I ran gutted cats for5 about 5 months now and I finally got Sal to turn off the o2 sensors. I never got a light. Sounded great.

 

I'll bet Burt didn't waste a second before clicking on this thread.

 

Guess that would be a cheaper way to get better sounding truck..............

PEacE.....................
Jim

 

Yeah, and now I have equal length bassani headers.

 

Ive had gutted cats for over a month and a half now im running around 15-16 psi , My truck hasnt thrown one code, and with the Jdm full exhaust w/ silver bullets, the sound is incredible.

 

Nope, and very disappointed, freaking cats...

 

What about emissions? Will it still pass?