RE drone; not sure if this relevant but did the aftermarket exhaust swap also and wrapped the pipes from mufflers up to the front cats (asbestos wraps? dunno the name of that stuff). It cancelled all of the drone I was getting in the mid revs. Sounds fab now... in and out of car
Later wrapped the headers also. Keeps the bay cooler
Wroom wroom in tunnels here also Bruce loll big time (5~6k rpm and all man)