When should you switch to Katech main caps?
Phil

 

I asked a few engine builder the same question and MTI said that they have made well over 800rwhp with the stock main caps. The truck motors (6.0) supposedly have forged steel mains and are stronger thank the nodular iron ones in the 5.7 car motors. Most said that above 850+ they might do it for peace of mind but none that I asked gave me a definite answer. Hope this help you Phil.
Jeff