Chevy Trailblazer SS Forum banner

SW LMF Question/Concern

1275 Views 10 Replies 5 Participants Last post by  Blades
I just installed my LMF catback the other day and it's loud but nearly as loud as I was expecting. Although I had a flowmaster 40 series in place of the stock muffler and I removed the resonator and I'm sure that would explain why it's not much louder to me.

Anyways, I don't know if it's supposed to sound like this or not but during wot and sometime crusing around at 2.5k - 3k rpms it echoes really strongly. It's a hard sound to describe but I just wanted to make sure that it was supposed to sound that way.
1 - 3 of 11 Posts
It may not be what others are talking about.. It might be the muffler vibrating at a very high hz.. Meaning.. very fast and short travel. Replicate the sound in park.. Take a towel or glove and place some force onto the muffler to "stabilize" it.. My truck seemed to start this sound at 2100rpm.. I had a friend hold it at that rpm.

Does it kinda sound like blowing across the top of an empty beer bottle? What I did was take 3 hose clamps and bent them to the size of the muffler.. Wrapped em around so that they hugged the muffler.. Wedged some small paper towel fragments between the spots where the adjustment screws for the clamps were.. No more weird bellowing echo. Kinda ghetto on paper but it worked out nicely.

The muffler is just too big.. It needs more structural stabilization esp in the middle.
When my TBSS gets up here I'll take pics.. Doesn't look too bad.. Much better than having it sound like that.. Ugh.. Try something with an echo. Like a small garage.. Rev it up to 2k.. Nasty and not in a good way.
Dude its already here. :) Whats your schedule like?
1 - 3 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.