In this video I’m bouncing between two things that always come up when you’re deep in MK4 life: intake manifold parts you didn’t plan on finding, and the little interior/HVAC stuff that everyone forgets until it’s annoying. I talk through a 2JZ billet intake manifold discovery and what I’m looking at when I see a piece like that—fitment, how it’s going to play with the throttle body and piping, and whether it makes sense for a street car vs. a bigger turbo setup where airflow and packaging start to matter more. Then I get into the SC300 HVAC cabin filter situation and how it relates back to the MK4 Supra world. If you’ve ever dealt with a musty smell, weak airflow, or just a nasty interior after sitting, this is one of those “why didn’t I do this sooner” checks. The takeaway is simple: the flashy power parts are cool, but the small details—clean air, working HVAC, and not cutting corners—are what make these cars actually enjoyable to drive after the build is done.