I'd probably say the wheel weights also specially idiots making that noise ...

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1997 White GC8 WRX - 3" TBE, Apexi pod, V6 STI TMIC, Kei Office coilovers, Whiteline F strut brace, GReddy Profec B Spec II, 2004 F&R brakes..

Are your wheels new? If so, it could possibly be that you're missing the Hub centric ring to fill in the the right hole size. I bought new wheels recently and had a similar noise in the front right wheel, took it to subaru and they said to get some hub centric rings. Give that a go?

So turns out the ticking noise was from the wheel weight! :S Such a simple little thing causing so much noise!

Also im going to attempt to fix the exhaust issue im having. The ultrex exhaust is hitting the body near the rear of the car. There is one bracket at the front of the exhaust that is near the gearbox. Should there be a bracket at the back of the exhaust before the muffler? There isn’t one there at the moment, so thinking of making one up. Is there a certain point towards the back or the car that would be good for an exhaust bracket?

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WRX MY05
215HP - 16 PSI
Ultrex TBE
Cobb Air Intake
STI Intercooler

Did you end up finding out what it was? Mine is doing a similar thing

Could also be wheel bearings as previously mentioned.

I had this issue before and I thought my wheel bearings were shot. Turns out it was just the brake pads and rotors that were causing the issue as they were totally worn down.

wheel bearing for sure. i had all 4 wheel bearings fucked after a collision. Makes loud scraping/ticking noises and gets louder as you go faster.