Flexible Fuel Tubing Question

[rgb@exact.com]

Ever notice how fuel tubing is flexible upon purchase, but
after a few years on the car it seems to harden?

Is there some uprated tubing that I can use that will allow
me to replace the fuel filter without cracking the hoses later?

Something that looks the same, is the same size (5/16") and
stays flexible forever for $1 more per foot would be ideal.

Thanks!

Roger

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Roger G. Bolick, rgb@exact.com, (512) 794-9567, FAX 345-2879