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Originally Posted by ItBites
Scott,
I am building my own headers and sidepipes right now. I am using dynomax 3" ID bullet mufflers (perforated, not louvered core). I have a flange connection at the collector where I am going to insert car chemistry inserts (really just a huge, power-robbing restriction). I'll use those only when I have to have it quieter.
It will be a while but I can let you know how quiet it is on a 540 BBC when I get it all put back together...
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Those are gonna be SUPER loud! Bullets are good for about 2 dBA noise reduction. You'll see.