black metal piece on 93 hatch firewall?????

[drift_motive]

ok so me and a buddy are in the middle of a sr swap om my 93 hatch we noticed that about 5 inches to the left of the brake booster( from front view of car) is this black bracket that has 2 bolts going into the firewall we tok it off cause it had nothing going to it and it's a solid metal block about 3 by 5 inches rectangle??? Can any one tell me why this is here I can't seem to find out anywhere else online thanks
DRIFT_MOTIVE

[s13_sr20det]

its a bracket to hold the A/C line coming from the passenger side of the firewall

[Souljahzs13]

I think thats the sound/vibration dampener for the firewall. My KADE chassis has it too.