What is this called

I know what it does but I lost one and need to track down a new one.

 

That's a valve cover. The right one. Or are you asking about the red thing you circled?

https://209yota1.com/products/11202...left-side-genuine-1988-1995/?add-to-cart=2502

 

What is the red spacer thing called?

 

The valve cover grommets?

 

Maybe bushings?

 

Compression Limiter would be the engineering term. It’s simply just a smooth bushing insert, sometimes flanged, sometimes knurled on the outer face to help keep in place when even a light press fit would compromise the plastic. Its job is to prevent distortion of the valve cover at the applied amount of fastener torque so its length is driven by the flange thickness minus a few thousandths less to provide a good ‘squish factor’.

 

The correct answer was given in post #5. Those are valve cover grommets.