Bushing squeak during braking?
 

Don't know if anyone else has experienced this but my car has started making a weird sound from the rear while braking. It's only at low speeds when you've almost come to a stop. It's one of those "once every revolution" sounds but the funniest part is that it's not a scraping sound like metal to metal but sounds like a suspension bushing squeaking. It's only under medium brake pressure as well so if i push harder or let off a little it goes away :-/ It's definitely from the right rear but i'm just baffled as to what it could be, everything is tight and the brake pads are near new so idk lol

Could be your new pads are slightly touching disc, disc might had a high mark on it (not normal)?
How long ago did you replace pads?

Try doing a few fast emergency stops, you could have a slight glazing on new pad face?

I think it could also be weather related.

I'm not sure how long ago the pads were replaced I think Rtres09 replaced them but i've had the right rear apart before trying to find other noises and inspected them at that point. I swear every time it starts to make a weird sound it's always the right rear it's almost like that part of the car is cursed! lmao I always park it in my garage but it started doing it in the past week so who knows maybe i'll just use this as an excuse for new brakes :-D

There really is not much in the Rear that can 'squeak'...

It is a very simple but brilliant design. (IMO probably the best suspension design ever made for any sports car).

If you think is is a 'rubber' type squeak, you could look at your rear Sway Bar Bushes, it could be too dry or have dirt inside....you need rubber grease to lube between bar and inside of bush, you have to take apart..

Rear suspension Control Arms/Ball Joints, I would spray some soapy water on the 'Bolted End' (Diff End), you will need to squirt a lot and let it sit for about 30 minutes, take for your drive and see??..

Do one task at a time to see IF you can isolate and locate the noise.