Hello,
I saw on the bulb codes for the high-beam that it requires H9. But I don't think such bulb format exists. Am I missing something here? I like to replace it with some Superwhite ones. also is there a DIY on this? I haven't look up the manual yet.

thanks.

 

Check it yo!
https://www.rx8club.com/series-i-exterior-appearance-body-kits-27/2004-mazda-rx-8-bulb-code-list-25466/

 

Not sure how much your willing to spend, but do a search on eBay for "H9 PIAA" and you'll find these:



I had the Xtreme Force H11 bulbs in my fogs for well over a year until one burned out and the color is great. The are a bit spendy though because they aren't available on the US market so you have to buy them from overseas. If you want something cheaper, check out Autolumination, they have a few different colors for under $15 a pair... but you get what you pay for.

 

Also on EBay, search MTEC H9 and select the colour range and price you want