Thanks for the suggestions. I've been listening for that "pong" noise a lot to pinpoint when it happens the most and based on the spring seats description I think that might be the most plausible cause. Then noise happens most when first starting (as I'm releasing the clutch and the car is...

I've had the same issue. It happens when I am turning left and I get a rubbing noise at the same rpm as the tires are turning. It is especially prominent when I'm going down a hill, and braking to turn left. But other times happens on a nice slow turn going 25 around a bend. Wheel bearing going out ...