I'm currently still debating on an exhaust. I'm currently looking into J's 70rr and T1R 70mm, both of which, as I understand, replace the cat.
I have read about using spark plug non-foulers or whatever, but I still have my 02 simulator from Casper's Electronics from my RSX, and on their site they say it is the same one that works with the S2000. Upon searching I discovered no one (to my findings) is using one of these. Is there a reason, like it doesn't work on the S2k, or what?

 

For those who don't know, this is what I'm talking about.
https://www.casperselectronics.com/Merchant...gory_Code=honda

 

not sure if either replace the cat, but my TS doesnt. most members here just use a anti-fouler to prevent the Check engine light to coming on.

https://www.s2ki.com/forums/index.ph...f=133&t=229959

 

I've read that T1R includes a test pipe, and J's 70rr is header-back.
I have noticed a lot of people using the spark plug anti-fouler method, but I've yet to see anyone using a Casper's O2 sim., which is why I was wondering if they work on the S2K.

 

I'm quite positive the O2 sim will work on the S2K. In my eyes, most of the enthusiasts here would rather spend $5 on a pack of defoulers than buy a $100 O2 sim that does the same thing.

 

Yeah, but it was only $60 when I bought it, and I had read that the spark plug method doesn't always work on the RSX. Now that I already have it, I figured I might as well put it back to use.