In over three years, we haven't had any failures or quality control issues with the JEs, although on occasion they will mess up an order, but for us it's only happened when we expedite an order. In some cases, we use other pistons, like keith black's, when available, since they provide the best bang for the buck. In any case, JE is really good about making good on their mistakes.
Charles Navarro
LN Engineering
http://www.LNengineering.com
Aircooled Precision Performance