Intended to safely mount a water/meth injection nozzle for detonation suppression, the flange also adds plenum volume (good for boosting midrange torque). A side benefit is that the hole may be utilized for injecting valve cleaning solution. (Water/methanol solution also washes away carbon deposits over time.)
Kit includes: flange, 1x o-ring, and 4x each extra-long bolts/machine screws (to fit all variants).
