engine bay bling my shiney ones are anyway

if you are pushing your car that hard thru corners with a damn sticky tyre, and still managing to keep it on the road, you may notice a little difference between with or without, if you rally and jump your datto regularly you may also notice a little less inward flex of the towers, and your alignment may last a little longer.
the firewall and the bulkhead will take the most of the twist ... how successful this is also depends on how much rust you have in the engine bay