So… What exact body set did you use for this? At any rate, I suspect you set most of the body/chassis components to transparent just to hide them.
Anyway, here’s my entry - the TSC Thunderwolf 5.0 GTS, a revised version of the oldest of my three FM4 entries, whose original incarnation was shown here. I was originally going to enter that car as-is, but cloned it, engine and all, and switched up the trim options for better performance, while also using as much of the budget as possible - with a $40k price cap, I felt it necessary to go all-out.
The original FM4-friendly version was not submitted with a detailed interior, but I added one after the deadline for that challenge passed, and I tidied it up for this latest version.