We this so many times , the S2000 Rear Bumper sagging
 
This Bar installs under the rear bumper , It prevents the rear bumper drooping.
 
We see this issue alot, the bumper droops and catching air causes it to droop more.
 
The plastic clips break and fall out,  this makes the problem worse.
 
If the clips fall out, the bumper can droop so much it can break the other mounting clips and cause spider cracking in the paint.
 
Most S2000 Rear bumpers with the clips in place often have drooping problem.
 
One you see it, You can't unsee it
 
This bar mounts on the outside of the bumper and includes 2 stainless Allen Fasteners that pull the bumper into shape.
 
The Bar is Billet CNC 6061 Aluminum Anodised black .
 
It includes 2 stainless Allen Fasters and stainless Lock nuts.
 
Install:
 
Remove the 2 plastic Clips with a flat blade screw driver.
 
Install the Bar on the outside.
 
The Fastener will go through the bumper and through the metal tab, the lock nut will go on the inside.
 
You will need a 5mm Allen Key and a 13mm wrench.
 
Installs in minutes and makes a huge improvement.