I want to find a place to purchase 3/4 inch Dia metal flex-pipe to connect a short header to a exhaust / muffler. Any for sure place to buy this item. Thanks Capt,n

Flexible gas or water pipe at the hardware store. Commonly used to hook up water heaters, (the water pipe), or mobile home propane gas systems, (the gas pipe).

You will have to verify sizes, but you should be able to find something in 3/4".

http://www.homedepot.com/h_d1/N-5yc1...Id=10053#specs

AV8TOR

Since the water/gas flex pipe is copper, you might have problems at some point with cracks in the pipe due to the vibration from the engine. Copper isn't as ductile as some of the other metals. You might also try McMaster-Carr. They must carry everything in the world and their in (or seem to be in) most of the large cities in the country.

bb

I've used both copper and thin wall brass tubing in numerous of my home-made mufflers, brazed together. Never had a problem... Just don't try to use hardware store quality (Sta-Brite) silver solder. I did that once in a pinch and it melted off in minutes. Use bronze brazing rod or "honest to god" real silver solder or silver braze, but hang on to your wallet if you go for the silver products. They work great but are sold by the inch, and are very expensive!

AV8TOR

The thin wall corrugated tubing used for gas lines is stainless steel,It works great for exhaust headers.

This sounds great....off to get some today!!! Thanks Capt,n

Well I looked all around town and cannot find this in 3/4 inch dia. Where in the world do you find it? I have called many places in the cities around here. No one knows of it???????

I have used flex pipe to connect water heaters, and the flex pipe nut screws right onto a 1/2" diameter galvanized plumbing pipe. I think the i.d. of the tubing itself should be close to 3/4".

I tried to find some on the web for you, but for some reason many sites say "not available online", so I couldn't review specifications. Odd, I don't know why they are available in the stores but not online...

Gas pipe for natural or propane gas comes in different sizes and should work fine too. You might try propane suppliers?

AV8TOR

It has a yellow plastic covering and might be called gasflex, most any heating installation outfit will have some scraps. it comes inside diameter of 1/2", 3/4", and 1" etc.

You can use silver coins. Use only grubby ones with no value other than the metal. Flux as you would for silver soldering or brazing. Cut slivers off with snips and place then on the fluxed joint then melt it into the joint. (Old gunsmith trick)

I thought there was almost no silver in any of the coins anymore?

AV8TOR

well, he did say "old" gunsmith trick...

This is the kind of flex pipe I want to find...in photo below. Capt,n

Sure looks like flexible water or gas pipe to me.

AV8TOR

that's the fancy stainless steel stuff, it is REALLY thin and hard to weld... I don't know where we get it at work, mcmaster carr or grainger might have some though