During the time this post started going south 7-23-16 to 7-24-16 I was sicker than a dog and ended up in the emergency room. I apologise if I offended anyone but posting from my cell phone only I was trying to keep this post on point for myself as much as others so hopefully some good info could be shared. Trust me I tried to research them before my Friend bought them but there is almost NOTHING floating around. I'm super glad he bought a set of heads that put Edelbrocks to shame and I for one will never buy another set of Edelbrock RPM's till the issues are addressed. Victors???? yes I hope to have a set SOON.