Selling brand new pair of stainless O2 spacers. I bought these as a backup for my DKF S pipes w/ 300 cell cats. Though most have passed emissions with this setup, there were few one off cases where CEL would later appear. Turns out I'm one of the lucky ones as I've logged 600 miles w/o a CEL. Full disclosure these will NOT help you pass if you're FULL catless, only should be used if you're running high flow cats and just need a little extra help to get you over the hump.
You see these anywhere from Amazon to eBay. The cheaper ones usually don't have the honeycomb and the ones that do usually require 4 weeks shipping overseas. Send me $15 via PayPal as gift and you'll get it under 5 business days lol. Check my iTrader, PM if interested.