Skip the ZZP mounts and get solid rubber mounts for cheaper. New rubber bushing for the dog bones should work or flip them.
Stay 180 thermostat, never run a 160 as it's not needed. Fan tuned for it will help otherwise it's pointless to run anything colder than stock 195.
Most headers come with complete downpipes, so no need for buying one or making one.
K&N filters suck, the oil can ruin the MAF sensor, dry flow filters are far better.
I'd get a scan gauge or if you have a tuning program view that before dropping pulley size, many times the car will not like the extra boost that comes with smaller pulley.
And welcome.
