Could anyone tell me whats available for the Murano excl: cold air intakes,chips that would make a significant difference in overall performance - 50 - 80 hp increase.

Unfortunately I do not believe there are many upper-performance parts for the murano. I'm sure there are basic bolt-ons like intakes and cat-backs but you will be lucky to get 10-15 crank hp out of those. That leaves a custom-built turbo setup to get the hp gains you want unless you go with a Nitrous Oxide system.

I'm sure someone will correct me if I'm wrong.

The CVT is very limited in the amount of extra torque it can survive.