Generally, no. But what Jagwire housing and what cable, specifically? There are multiple varieties of each, some with internal linings/teflon coatings and some with bare steel. You generally don't want to lube the ones manufactured with their own "lubrication."

It doesn't make any sense to replace new cables or to lubricate them.

Always thought they were pre-lubed.

Do whatever the manufacturer suggests for the product, they just might know it better than anybody else.

I just looked at the housings and for some reason I thought they were Jagwire but the are actually shimano. The cables that I purchased are the Jagwire slick stainless. It looks like the shimano cables have a teflon coating.

I agree but in this case the cables have kinks in them where they mounted to the front and rear mech's. I have a feeling that if I pulling them through the housings, the housings will be damaged.

That's my thoughts as well but you know we just have to complicate things here :)

Just a heads up. Jagwire makes awesome "Pro shift kits" but the housing is 5mm housing instead of 4mm. It was a royal pain in the ass trying to route that through my frame. They're really nice, and the best shifting I've ever had. Basically it includes an inner housing that's pre-lubed. It also contains little grommets to prevent any dirt from entering that inner housing. Is it worth it? I wouldn't do it again, go with the cheaper stuff.

I've always used a wet lube on my cables