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    Thread: Rear Firewall

    1. #1
      Join Date
      Feb 2011
      Posts
      284

      Rear Firewall

      When you guys mat the interior, do you block the rear firewall holes or leave them open? The factory left huge openings there, not sure if they're by design or what. I thought they may be there for airflow or something. I have a subwoofer in the trunk and have been giving some thought to properly setting the car up for sound. Easy enough to block with dynamat from both sides.

      70 GTO - Alum 5.3/4L80e, 7875
      17 GT350


    2. #2
      Join Date
      Feb 2011
      Posts
      284
      Nobody?
      70 GTO - Alum 5.3/4L80e, 7875
      17 GT350

    3. #3
      Join Date
      Mar 2007
      Location
      Florida
      Posts
      2,391
      Country Flag: United States
      I believe part of the reason for the openings was for the "Astro Flow Through Ventilation" that circulated air through the car and out the door jamb vents. Air flowed through the cabin into the trunk and out the vents. I saw your post a couple days ago but didn't respond because I'm not an audio guy and don't know how sealing it off will affect sound quality. I sealed mine off because my car is more of a track car and fire possibilities are more important.

    4. #4
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      16,129
      Country Flag: United States
      Here is what I did...



      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
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      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her




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