Models up to now have had a terrible time generating the tail of the Porsche 917K correctly. I finally decided to make a LoRA to generate only 917Ks with the correct tail. I succeeded by training the **** out of it with 75 images and 9600 steps. The combination of flux1-dev-Q5_K_S.gguf with this LoRA gives results I'm sure you will be happy with. It retains flexibility of scene, lighting, and artist style (such as it is for Flux...) as you can see in the sample images.

Prompt for colors with "{color} with {color} stripes". You can try "martini livery" for the famous red & blue stripes on a white body, "gulf livery" for the ubiquitous orange stripes on a light blue car, "purple and green" might get you the fabulous hippie car, you might be surprised at what it knows. It understands front view, front 3/4 view, side view, rear 3/4 view, and rear view. Also high view and low view.

Giving credit is easy. Just say something like "Porsche 917 model courtesy of JJLudemann." You can find me everywhere: Deviantart, Facebook, Bluesky, Github, LudemannEngineering.com, etc...