Cold intake on 2007 Volvo S80 AWD V8 4.4L
 

Will cold intake any kind of power? And if so which one should I get.

highly unlikely an after market cold air intake would produce any appreciable power gain on an NA engine. The factory design on volvos is pretty good and can flow more than enough air to produce top HP. If you want to google around Snabb makes intakes for Volvo turbos, not sure about the V8. I'd also caution against oil based air filters (like KN) on a modern car with a MAF. Many of these parts got their value reputation on cars with less than optimized intakes (read as "older smogged out American cars"). https://nicoclub.com/archives/kn-vs-oem-filter.html

Ok thank you I will check it out now