I replaced mine 2 weeks ago. They were about 3 yrs old and sound just like yours did. They are "Fuel Line" and I was surprised that they cracked that way in just a few years.

Always Something...
Buddy


"Keep the shiny side up....."
'50 GMC Suburban
'55 1st Chevy Pickup
http://community.webshots.com/user/buddyinak