So, late last night I reinstalled the stock springs onto the Bilsteins... Aftermarket springs was degrading the performace and ride for my 14 MR.

Driving in this morning, out of front right side I hear and feel "clap...clap" over bumps. I visually inspected the shock mounts at top and thru the wheels and nothing seems missed but don't know what this noise can be?

It's tougher reseating stock springs due to their longer sizing and so it was not seated perfectly onto the groved sections, off maybe 1 inch... but can't imagine this is the cause?

Also, installed a higflow cat onto stock exhaust. It looked tight and dont think this is causing it.

Any ideals before taking the wheel off again?
BTW, I did install 20mm spacers few days ago but saw no prob w/ it... thx