im planning on gutting my GSR cat (obd2) since my planning on dropping my exhaust and run straight downpipe (FMAX turbo)

will i get a CEL?

 

Yes, code 67.

This will not affect performance at all.

 

and code 67 will be Secondary O2?

even though i put both O2 sensor back?

so it shouldnt affect my performance? how so? i thought when you have CEL...the ECU will be in default mode and will dump alot more fuel?

 

please do not gut your stock cat...those obd2 cats are worth a few hundred bucks...around 600 for a new one..there are no obd2 replacements yet so save the cat and go carsoud or stright pipe....you can make a lot of cash selling your stock cat to some muffle shop or so..

 

Get a test pipe. As mentioned above, stock cats are stupidly expensive. Actually, you *should* just get a larger-diameter high flow cat instead. 2.5" downpipe, 2.5" cat, 2.5" b-pipe and you will be happy.

 

don't do it!

 

strange..... I'm running straight pipe w/ my turbo setup and i'm not throwing codes. 96 GSR here w/2.5" dp and 3" back. Both o2s hooked up and everything.

 

Maybe you or the previous owner took out the CEL bulb.

 

I run around open header/test pipe and it can take me 1,000mi before I'll finally throw a code.

 

Why would cats be so expensive? They are ****... and it's stupid that you can't buy a used one legally. (Yah I tried)

Don't gut the cat though.

 

Why does it take that long to throw a code? Does the O2 finally burn out or something? No the CEL is not removed. I was throwing codes before.