Originally Posted by snrusnak
^doesn't the spark plug non fouler spacer trick work for the rear O2's to eliminate engine lights? Still would run a little lean without a tune but would be stronger than stock.
The above is true about the spark plug fouler, however I would never want to run lean on a HEMI engine... Rings are so close to the top of the piston that any detonation and you would be replacing a motor.