Hopefully you'll be switching it to the updated boost reference solution [MENTION=11292]PewterCam[/MENTION] mentioned. I had that original kit too and called TS and got the new kit. As mentioned, it heat soaks the sensor for the CAT making the ECU think the intake air is much hotter. The ECU will then retard timing, robbing you of power.Thanks for the info.
For anyone who is curious, it is Size -110 O-ring.