Originally Posted by Krio

The Kashima coating is harder and smoother than the stock bodies (inside and out). They are worth it if you need to replace the original bodies due to wear and tear AND you are looking for every micro advantage you can find. If you are a mortal like myself who needs the best bang for the buck, the stock bodies are more than adequate.

Personally, I have never broken a plastic shock cap on my 10th scale AE cars in the last 6 years. Also, I'd rather break the shock cap than whatever was next in line to take the hit.