This is a get out clause if it all goes tits up. Remember wilwwods are American. Americans sue each other at the drop of a hat or less...
kEEP THEM CLEAN AND YOU WILL PROBABLY BE OK !
I've looked into this a lot...
Pro and cons of dustseals..
Pro's
dust doesn't get in round the pistons casuing them to possibly stick
acts like an OEM caliper. You don't have to keep them clean and keep and eye on them for corrosion on the pistons etc
Con's
racers don't like them as the seals get buggered, melt, ripped etc
Pro and cons of not having dustseals..
Pro's
selas don't get buggered, cause you havn't got any !
Con's
You really have got to keep everything clean ! Really clean.
Pistons.
This is important especialy if you don't have any dustseals.
Best material to be made out of is stainless steel
Second best is an anoidised type of finnish
Worst is none of the above !
What i can tell you based on months of looking into this a year or so ago is that outlaw calipers have stainless steel pistons and no dust seals (i bought these)
HiSpec have anodised type of pistons (poor reputation for service and quality etc, search on google...)
Wilwwod have neither. (double check this as they might have changed them)
Now then. This might have all changed with the willwoods, best ask rally design as they are the uk distributor. OR do some research on the internet, phone suppliers up etc
Hope this helps and don't piss on anybodys fire...
You will be fine with the wilwoods, there are thousands of cars with them fitted !!!