Hi everyone, I just bought a GF (with naturaly aspirated EJ20) for really cheap, just to have fun, to start wrenching. I have NO experience with working on cars except things like changing oil, brake pads, calipers, discs, spark plugs..just the basic stuff. I bought the car to experiment, it was 200€, its not road legal, I expect Im gonna screw up at some point and blow the engine. So don't even go there - I know I don't have the experience, that's why I bought the car. Question is - what mods can I do to the engine that would actually increase its power? Something I could do at home, by myself I want to go the NA way, Im not gonna turbo it, not an option. Neither is a swap - I want to work on the engine, not swap it, even though that might be the best way to get more hp. Less restrictive exhaust? Improve the airflow to the engine? Better cams? Which ones? Bigger throttle body?