So I'm new to the JDM car modification world. But I know cosmetics are one thing but I'm trying to look into performance upgrades. So far I'm looking into a Takeda or AEM CAI and Mishimoto or PRL intercooler. However, I'm trying to see if there are performance upgrades aside from that such as coil plugs, spark plugs, e85 conversion kits, suspension (no stance nation for me) and if a Type R turbo upgrade would work for my car. I'm not trying to mess with the exhaust, so all the input I can get is appreciated.