Keep in mind you are wide open on the intake now, you will now hear intake noise you weren't exposed to previously. Don't know if you did this, seems to no longer be mentioned. Disconnect the battery for 30 min to reset the computer. It will start to re-learn around the set-up you have, give it some mileage to adapt. The O2 modifier has been hit or miss for many on here, if the problem still exists go back to using the O2 sensor and try again. I would do this before spending on a juice box if this is the only reason you want it.
I have the same set up in my 2009 SE5.
Installed the Hindle because of looks and sound. And it started popping at deceleration.
Then I did the "canisterectomy" to get rid of fumes near the engine and gas tank. No noticeable changes in the air-gas mixture.
Due to oil leaking out of the huge OEM air-box, I then decided to install the KewlMetal air-filter arrangement, as the engine breather hose now connects with the throttle body instead of discharging oil fumes into the air-filter enclosure.
All this led to pre-detonation in the throttle bodies when accelerating and back-firing in the exhaust during decelaration, as the air-gas mix was now too lean, and the ECM could not cope with it.
So I installed the O2 Modifier, and it helped just a little, almost unnoticeable.
After so much pondering and consulting with members of this forum, I installed the original "Juice Box" on its factory settings (but did not remove the O2 Modifier).
The "Juice Box" did improve the whole scenario, although some "mild hiccups" (upstairs and downstairs) occasionally occurs. I am not so keen to fiddle with the settings, so I will see if the whole situation improves with time.
In all the cases above mentioned, I have disconnected the battery for at least 1 hour, reconnected it, started the SE5 and let the engine run at idle for 15 minutes, switch it off and let it cool for another 15 minutes, and then run it like I stole it, in order to "reset" the ECM to the new conditions.
That's my 2 cents... Hope it helps you with your Spyder.
Saludos, Pilo