Flex Steel or Rigid Brake Lines off of Master Cylinder?

[Calif240]

Hey guys, my original brakes lines off the master are gonna need to be replaced as they're starting to show signs of corrosion. Is there any advantage to using rigid lines over stainless steel flex, or vice versa? I have a stainless steel flex line that should work, but know that I usually see rigid lines coming off of master cylinders. Can someone offer some help?

Thanks!

[Rolling_Thunder]

I've wondered this myself...    usually people use hard lines to keep line expansion to a minimum in their system (thats why some people go to stainless front and rear flex lines instead of stock rubber) - but certain cars like the S/S Darts and Barracudas used flex lines form the master to the metering block...     

Would there be any negative to using stainless flex lines from your master ?   I highly doubt it would be noticeable - but wait for someone who knows.   

[Mike DC]

   
The S/S Darts had a big Hemi motor crammed into an A-body engine bay.  They would have been moving the MC on a regular basis just for access reasons. 

[elacruze]

There is no downside to flexible line unless you don't like the look or non-originality.

The Caveat is that not all SS lines are created equal. Most are not DOT certified and simply stated could conceivably be used to make an accident your fault. Also, proper installation requires more fittings, gaskets, and care than hard steel lines. And a lot more cost.

I've seen a jillion different lines by nearly every manufacturer-the only ones I can recommend without any reservations are made by Goodridge http://www.goodridge.net/webapp/wcs/stores/servlet/category2_-1_64_10551_32019_retail

They're a little harder to source than Aeroquip or others, but they have DOT certification and are also available with a synthetic jacket to prevent them from sawzalling their way through whatever they rub against.

It's entirely likely that Aeroquip or some other manufacturer offers gear just as good, but I haven't looked around in some time.

[HPP]

I've had braided stainless fuel lines develop leaks after several years of use. I don't know if the brake lines are made differently, but that isn't a part I'd care to have suddenly do a sieve imitation when I step onteh brakes after a winter's storage.