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Old 04-17-2013, 04:46 PM   #1
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Brake lines - OEM, Stainless or Cunifer

One of my brake lines from the MC failed and it's time to replace them all. It's all 3/8" OD tubing right? I'm not talking about the lines to the wheels, those I am not replacing at this time.

It took 15 years for the first line to fail, so OEM mild steel is probably fine. Any recommendations for Stainless of Cunifer? Cunifer is the easiest to work with and the most corrosion resistant. I've worked with OEM mild steel before and it's not easy, but doable. I've never worked with stainless.

No I'm not inclined to buy pre-formed lines.

What sayeth the experts? What do you recommend? Sources?

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Old 04-17-2013, 06:21 PM   #2
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One of my brake lines from the MC failed and it's time to replace them all. It's all 3/8" OD tubing right? I'm not talking about the lines to the wheels, those I am not replacing at this time.

It took 15 years for the first line to fail, so OEM mild steel is probably fine. Any recommendations for Stainless of Cunifer? Cunifer is the easiest to work with and the most corrosion resistant. I've worked with OEM mild steel before and it's not easy, but doable. I've never worked with stainless.

No I'm not inclined to buy pre-formed lines.

What sayeth the experts? What do you recommend? Sources?
The OEM lines up until 03 are not just mild steel, they are electrogalvanized steel. I would do stainless if it was mine, but I have the tools that will double flare it with ease. If you are capable, do that, if not, the Cunifer is probably as good as your going to get easily done. I'm assuming that is also referred to as Bundy tube?

For the record, the line size is 3/16".

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Old 04-18-2013, 09:52 AM   #3
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Oops, I meant 3/16. I have the right tools for double flaring and I've done a few brake lines before, never an entire vehicle. I'm not sure if my flaring tool is good enough to double flare stainless.

I had to look up bundy tube and it seems it is not the same as Cunifer. Cunifer is a copper nickel alloy and very easy to work with and super corrosion resistant.

Thanks, I think I might go with the Cunifer or the Bundy that you mention.

EDIT: Just read a little about Bundy and it seems it is prone to corrosion.
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Old 04-18-2013, 10:03 AM   #4
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Oops, I meant 3/16. I have the right tools for double flaring and I've done a few brake lines before, never an entire vehicle. I'm not sure if my flaring tool is good enough to double flare stainless.

I had to look up bundy tube and it seems it is not the same as Cunifer. Cunifer is a copper nickel alloy and very easy to work with and super corrosion resistant.

Thanks, I think I might go with the Cunifer or the Bundy that you mention.
I've done hundreds and hundreds of DFs on the OEM and similar lines so much so that I've worn out an Imperial DF tool in 3/16's and had to replace parts to keep it going.

I invested in a Mastercool tool and with no instruction just dinking around with it, the first DF I did on some scrap line was better than my best one ever done the old way. Or I only thought I had good tools and knew how to use them.

That said, I don't recommend it unless you do a lot of flaring or just like to own expensive tools and the only reason I brought it up was the huge difference in quality the final product is.

Thanks for jogging my memory on the cunifer. I had it confused and it I'm not mistaken it is what is used on the high end cars is it not?
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Old 04-18-2013, 11:41 AM   #5
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It's about double the price of standard brake lines. I know they use it mostly in Europe. I just ordered a 25' coil of it. Do you think I will need to get a straghtener since it is in a coil? I don't have one.
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Old 06-26-2013, 11:14 PM   #6
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On my last brake line replacement I invested in a Craftsman (Sears) flare tool set. It Worked a lot better than the Chinese made ones. (broke two brand new ones)

I also used the nickel-copper alloy line in a coil . It was very easy to work with. I dont trust the steel lines (non stainless) any more since my state uses potassium chloride on the roads now. (Va.) All of my vehicles brake lines had rusted badly to the point of rupturing under pressure.

Just make your bends gently and it will be fine. I only needed my hands to bend it. Secure the lines where they wont be struck by rocks limbs and such.

Youtube has some great how to vids on double flares .
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Old 06-27-2013, 06:31 AM   #7
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The front passenger line is difficult to bend properly and have it look right. I would buy that one pre bent.
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Old 06-27-2013, 10:04 AM   #8
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The front passenger line is difficult to bend properly and have it look right. I would buy that one pre bent.
It just takes patience and a willingness to be patient and not get in a hurry.

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Old 06-30-2013, 12:45 PM   #9
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bought complete stainless steel brake line kit from INLINE tube for my jeep for 180

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