upgrade

Hi all, I'm pretty new to all this stuff but I'm learning as I go. I'm trying to create a pretty decent NA build overtime but I'm not 100% sure on some things. I just purchased skunk2 stage 3 cams along with titanium retainers and new springs. I plan on buying a new chain and tensioner as well...

Would anyone have a good link for how to replace the door speakers? Also, I found this site for replacements to get: https://www.crutchfield.com/g_400/All-Car-Speakers.html?l=C Does anyone have suggestions on what models to get? My audio system is just the stock, premium sound system, but I...