Those hard lines aren't the only parts to deteriorate, rubber breaks down over time too. So while you've replaced the rusting lines, the hoses they attach to could also stand to be replaced.
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Dorman Products
FLH381343- 00-05 Blazer or Jimmy with ZR2 / High Wider Right Front Brake Hose; Rubber
Sale price$18.54
Regular price$20.60
Save $2.56
Dorman Products
FLH620177- 02-08 Ram 1500 Right Rear Brake Hose; Rubber
Sale price$23.04
Regular price$25.60
Save $1.44
Dorman Products
FLH38898- 90-94 Ford F-250 / F-350 4wd Left Front Brake Hose; Rubber
Sale price$13.01
Regular price$14.45
Save $1.62
Dorman Products
FLH380354- 95-97 Ford F-250 / F-350 4wd Right Front Brake Hose; Rubber
Sale price$14.56
Regular price$16.18
Save $1.62
Dorman Products
FLH380353- 95-97 Ford F-250 / F-350 4wd Left Front Brake Hose; Rubber
Sale price$14.56
Regular price$16.18
Save $1.38
Dorman Products
FLH38121- 80-89 Ford F250 / F-350 4wd Left or Right Front and 90-97 Right Front Brake Hose; Rubber
Sale price$12.40
Regular price$13.78
Save $1.39
Dorman Products
FLH380469- 96-05 GM S-Series 4wd non ZR2 Right Rear Rubber Hose; Rubber
Sale price$12.49
Regular price$13.88