You dont pack them tight, you pack in just enough. You can always take the brillo out. The mesh as 5/32" holes. Those ones we use on a 602CID BBF in a boat wet exhaust that breaths 1100+ CFM and havent had a single problem with restriction. We tried about 5 other methods and thats the most effective that we have come up with.

 

Creativepunka, I'm working on "pre-silencers" for my 12a peripheral port to keep that beast quiet. Any pics of the perforated pipe? Do most muffler shops carry it?

 

how do you put holes in a pipe?

 

Yeah, I've been that route. Do you have any idea how long that takes when making two 24" pre-silencers?
Purchasing a piece of already perforated pipe would make that job so much easier.

 

Go to your local motorcycle dealership and ask for a muzzys silencer re-packing kit. Perf. pipe, and fiberglass packing =$18.00 For the win! Standard silencers are 2" I.D. and 18 inches long.

 

Fiberglass packing usually dies quickly on a rotary. Gotta go with ss or lava rock.

 

Go for what works.

 

----, chopping up an apexi WS would make me cry. Did you buy the turbo sized muffler, Mine is the straight thru design and has excellent flow.

 

---- that, you don't need packing to make a muffler.