Originally Posted by Autostream
All you need to do to make it inoperative is remove & plug the small vacuum hose on the valve behind the airbox. Leaves the clutter but stops it working.
Plugging the vacuum hose doesn't stop it from working, it will make it work all the time. The vacuum signal to the valve shuts off the flow of air to the exhaust under high vacuum condtions (decelleration) to prevent backfires.
If you just plug the vacuum hose, the system will work all the time and you will have backfiring on decell.