I think electric supplimental heat has to be one of the best things going for the '08, unfortunately it's only available in automatics due to the duct running down the tunnel. Anyone know if it installable after the fact?
I asked the same question some time ago and in the end I don't believe it's practical. The element sits inside the ducts and would require at the very least a dash tear down. Not to mention you would require the larger alternator as well.