Perforated tubing. Anybody know where??

[theMelvster6]

I have been looking around, and you'd think I'd be able to find it....but NO! I am reworking the inside of my stock exhaust and I'm looking for 2 1/2" perforated round tubing to do the inside. Any body know where to get it?? I'm temped to buy a cheapy glass pack and steal the insides...I can get one for like $20.

 

[Stillonit]

mcmaster carr you can buy the perf sheet. just need to roll it.

 

[stensg]

take your pick

 

[snrusnak]

Another option is to grab any stock muffler(off a car, etc) and use a piece from it. I'm doing that with the stock muffler off my dodge ram. FREE!

 

[theMelvster6]

I talked to my pops and he is bringing home a perforated sheet of stainless, I suppose I can use some 309L maybe 308L rod to weld to the mild steel. I want to make one of the ends removable for repacking...or not? Anybody know of durable materials/methods to pack?

 

[konarider94]

i think rock wool is the longest lasting but im not positive on that.

 

[d_adams]

Mild to ss, use 309.

 

[theMelvster6]

Thank you! I've seen all kinds of stuff inside of mufflers...rock wool, ceramic, steel wool, steel mesh, stranded fiber glass batting, fiberglass wrap, etc. I need to do some research I guess...I'm not a drafting wiz on the computer or anything. I just spend a lot of time thinking about it and basically construct it in my head, then go build it...LOL

 

[snrusnak]

Personally, I wouldn't use any packing, that way it's maintenance free. Yes will be louder but I guess it just depends what you're going after. The stock muffler shell has a lot of volume, it should still reduce the volume greatly even without packing.

 

[wally]

Can't imagine it being that hard to track down? I went to a local custom car exhaust shop and bought some off-cuts.

 

[Jramsey]

https://www.denniskirk.com/la-chopp...sal-baffle-w-packing.p4405069.prd/4405069.sku

Ignore the catalog thickness spec , its 16 gauge.

 

[theMelvster6]

I actually ended up cuttin apart a factory pipe off a Honda CBR...and found some inside!...FOR FREEEEEEE! but that 309 rod is some expensive stuff!

 

[d_adams]

$14/lb isn't too high. Ti rod is a wee bit more.

 

[theMelvster6]

oh damn I got robbed!!! Freaking guys charged me an arm and a leg for one rod!!

 

[d_adams]

Any local welding supply shop will have it in stock. Ceekay is local for me, that's the average price for 1/16th 308 or 309 ss. I usually buy 5-10 lbs at a time though. I think the larger size rod might be a little cheaper, 3/32" might be about $13 or so per pound.

Btw, you should look for some perf tubing with 23% opening, I think it's just 1/8" holes. The ones with bigger holes make it a lot easier for the packing to blow out. That's part of the reason jardine pipes need repacking so much.