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flex exhaust tubing
by
92EcoDiesel Jetta
on 17 Sep, 2011 11:28
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Anyone used them? I bought a 2" i.d. 10 ft galvanized (Walker) to splice into the broken pipe (muffler fell off broke at the axle) and run it out the back. Are these things air tight? What's the best way to cut them?
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#1
by
Luckypabst
on 17 Sep, 2011 14:03
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Should be airtight, however 2" sounds awful large to try to seal against the existing rigid tube. I'd probably cut it with an abrasive chop saw... barring that, a sawzall or hacksaw should work.
I think I'd swing by the muffler shop before repairing with flex tube, however.
Chris
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#2
by
92EcoDiesel Jetta
on 17 Sep, 2011 17:05
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Should be airtight, however 2" sounds awful large to try to seal against the existing rigid tube. I'd probably cut it with an abrasive chop saw... barring that, a sawzall or hacksaw should work.
I think I'd swing by the muffler shop before repairing with flex tube, however.
Chris
I had to expand the flex pipe a little in order to fit over the 2" o.d. (broken) pipe so it's gonna be a tight fit. I did go to about 4 muffler shops, each wanted around $150 to make and put on a pipe that is around 45" long with one bend in it.
No way!
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#3
by
Luckypabst
on 17 Sep, 2011 19:06
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Ouch! That's outrageous
I didn't realize the rigid tube was so large... sounds like you're good to go.
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#4
by
R.O.R-2.0
on 18 Sep, 2011 10:01
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Should be airtight, however 2" sounds awful large to try to seal against the existing rigid tube. I'd probably cut it with an abrasive chop saw... barring that, a sawzall or hacksaw should work.
I think I'd swing by the muffler shop before repairing with flex tube, however.
Chris
I had to expand the flex pipe a little in order to fit over the 2" o.d. (broken) pipe so it's gonna be a tight fit. I did go to about 4 muffler shops, each wanted around $150 to make and put on a pipe that is around 45" long with one bend in it. No way!
everywhere shop around here, wants under that for a full exhaust system..
and flex tubing is air tight enough to be used for boost tubing.. ive never done it, but a friend has..
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#5
by
92EcoDiesel Jetta
on 18 Sep, 2011 12:23
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Should be airtight, however 2" sounds awful large to try to seal against the existing rigid tube. I'd probably cut it with an abrasive chop saw... barring that, a sawzall or hacksaw should work.
I think I'd swing by the muffler shop before repairing with flex tube, however.
Chris
I had to expand the flex pipe a little in order to fit over the 2" o.d. (broken) pipe so it's gonna be a tight fit. I did go to about 4 muffler shops, each wanted around $150 to make and put on a pipe that is around 45" long with one bend in it. No way!
everywhere shop around here, wants under that for a full exhaust system..
and flex tubing is air tight enough to be used for boost tubing.. ive never done it, but a friend has..
Why is there such a big difference? I didn't think OR is an economically depressed area or is it that people are more greedy on the east coast?
Probably cheaper to get a custom exhaust made up and ship it to me. Will you do that?
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#6
by
R.O.R-2.0
on 18 Sep, 2011 12:36
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Should be airtight, however 2" sounds awful large to try to seal against the existing rigid tube. I'd probably cut it with an abrasive chop saw... barring that, a sawzall or hacksaw should work.
I think I'd swing by the muffler shop before repairing with flex tube, however.
Chris
I had to expand the flex pipe a little in order to fit over the 2" o.d. (broken) pipe so it's gonna be a tight fit. I did go to about 4 muffler shops, each wanted around $150 to make and put on a pipe that is around 45" long with one bend in it. No way!
everywhere shop around here, wants under that for a full exhaust system..
and flex tubing is air tight enough to be used for boost tubing.. ive never done it, but a friend has..
Why is there such a big difference? I didn't think OR is an economically depressed area or is it that people are more greedy on the east coast?
Probably cheaper to get a custom exhaust made up and ship it to me. Will you do that?
im not driving my jetta anymore, so i couldnt get the right exhaust made up. the cars that i drive, are a GTI, and a Rabbit..
exhaust systems are fairly cheap in oregon, well, atleast at the shops that i go to.. and they do very good work also. it was ~$200 to get a new exhaust system put on my 63 Olds.. he did a VERY GOOD job, and 2 knock off flowmaster mufflers were included, along with all the pipe, for that price..
another thing, none of my vehicles need a catalytic converter added to the exhaust systems, so that takes cost off right there..
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#7
by
Luckypabst
on 18 Sep, 2011 14:49
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I was thinking the same... last time I had it done, I had duals run from headers back for around $200 in one of the more expensive markets. Considering you're looking for about $15 in materials, they're making a killing for what should be well under an hour in labor for a good exhaust guy.
Chris
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#8
by
745 turbogreasel
on 18 Sep, 2011 20:04
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I just ran my 3" flex pipe down a gopher hole after the little bastard failed at sharing one too many times.
Conclusion is... airtight and seals good.
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#9
by
RabbitJockey
on 18 Sep, 2011 20:37
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when i worked at napa, someone would always pull up in a weird car and buy 4-5 feet of this stuff. one day it was 2 college aged kids came in a turbo 90s 3 series, one kept giggle as he bought the flex pipe... another time some guy came in a turbo volvo and bought some, he wouldn't do a burn out he told me his car was slow haha. people used to always do burn outs for us in there on sundays, the best one was when some old spanish guy with a crx came in with his son. he couldn't speak english and his car looked like a turd with spray painted wheels, then he took me out to check out his car, and he had a b18vtec or something in it with all the goodies but no turbo, the old guy had made all the mounts and stuff himself. man he pulled out the parking lot and left like a 30 yard set of black strips bouncing off the rev limitter and stuff, really surprising haha. worst was a guy in an old galant with a 4g63t swap, he started doing a burn out and then his timing belt snapped. that was a sad day.
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#10
by
92EcoDiesel Jetta
on 19 Sep, 2011 15:21
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I haven't installed the flex tubing yet. I am using this VW exhaust band clamp 357 253 143A which closely fits over the flex tubing. It looks something like this pic (which is not to scale).
Should I put some muffler cement between the pipe/stub and the flex tubing or should I assemble it dry and just the clamp is sufficient?
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#11
by
R.O.R-2.0
on 20 Sep, 2011 11:16
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welder works better than clamps..
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#12
by
92EcoDiesel Jetta
on 20 Sep, 2011 12:32
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welder works better than clamps..
Can you weld galvanized flex exhaust tubing? I know about the toxic fumes but will it weld?
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#13
by
R.O.R-2.0
on 20 Sep, 2011 12:37
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welder works better than clamps..
Can you weld galvanized flex exhaust tubing? I know about the toxic fumes but will it weld?
hell yea it will weld, just dont breath the fumes. galvy welds just fine. it just scares most people.
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#14
by
Wayland
on 20 Sep, 2011 15:30
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I like to put exhausts together using Easy-Seal SS band-type clamps, similar to the VW type pictured above. They are very expensive but heavy duty, and reuseable, come in sizes ranging from 2" all the way up to 6", and make mods to the exhaust a breeze. Available from good auto parts stores or heavy truck suppliers. Most heavy truck exhausts are put together with these.