Glass Packs
Posting Guru
Joined: Oct 2003
Posts: 1,955
Likes: 0
From: Quesnel, BC, Canada
OK who told you guys that all mufflers have fiberglass in them. Any "bottle" has fiberglass. Any muffler does not have fiberglass. Like someone posted, they use baffles to dampen sound. There are infinate ways to set up the baffles.
Glasspacks are loud as hell, I just got rid of a mustang that had a 351w and dual bottles. They looked about 10 years old. All they really did was reduce the cackle of the exhuast. I miss that car, but i dont miss getting off the throttle everytime a cops near.
Glasspacks are loud as hell, I just got rid of a mustang that had a 351w and dual bottles. They looked about 10 years old. All they really did was reduce the cackle of the exhuast. I miss that car, but i dont miss getting off the throttle everytime a cops near.
Elder User
Joined: Feb 2002
Posts: 987
Likes: 2
From: East Bend, Carolina, U.S
If you have headers and use the glasspacks that bolt directly to them at the collectors you will soon after experience the burned out glasspack sound everyone knows about. Has anyone ever ran an engine with long tube headers and no pipe attached to them? If you have then you know about how far a flame will shoot out of them and thus the reason glasspacks won't last when bolted in this spot. If you install the glasspack muffler in about the same location you should install a muffler like a stock one then you will get more a useful lifespan out of a glasspack.
No plain steel muffler will last long if you drive on short trips that don't get the exhaust system heated up enough to expell the moisture in it.
No plain steel muffler will last long if you drive on short trips that don't get the exhaust system heated up enough to expell the moisture in it.
New User
Joined: Feb 2003
Posts: 20
Likes: 0
From: Ozarks Mountains
Glasspacks--deer woods
Glasspacks are cool going down the highway,or threw a mud hole. I don't know about some of you guys but my 85`351w with duel 18"packs out the back suck if your trying to get to the deer woods early of a morning.Even out on a county road on a sunday drive looking for 1 im dar deers!!!!!!!glasspacks ruin your chance unless your in west Texas where the roads dont have hills.Every time your truck kicks down a gear to go up an encline you bring the dragstrip to the deer! AH WELL must be a REDneck thing who knows 
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