ok.. im looking to cut the cats out my 97 z28. do i need anything before i get them cut out? o2 sensors, ect.???

 

Why are you going to cut them out?
You won't gain much of anything from not having them........
A CAI kit would do you much better.

If you still insist on getting rid of your polution control then you will need to fool the O2 sensors into thinking you still have cats.....

Good Luck.

 

If you want to lose the cats why not just install a set of single cat headers with no cat while you are at it? You can get a set used here for as low as $2-300. It's not fun messing with the stock dual cat y-pipe especially if it's been on there a while. Once you break a couple y-pipe studs taking it off to work on it you'll see what I mean Either way you will need rear O2 simms to avoid an SES light.

 

gregg i was planning on getting a set of headers as well I just need to know how to "fool" the o2 sensors.... anyone can help me out with that??

 

you will need o2 simmulators, i got mine from thunderracing.com

 

Thats basically what I did. I unplugged the 02's and through in the sims. This will fix the check engine light problem also.

When I cut my cats off, I could tell a little difference in performance considering I cut both of mine off at the same time.

 

02 sims $90
OBDll to 1 conversion $225 takes care of problem + added performance

 

ok, just trying to get things clear in my head, these are all cases of peoiple that want to get rid of thier cats.. and don't have headers correct?