Review on 🔧 Optimize Performance with High Volume Internal Oil Pump for GM LS-Series Engines by Alfred Friedrich

I had oil pressure between 15 and 20 at idle and a maximum pressure of 35 when driving. The elevators rattled and three stores recommended a lifter job for about $1,500. I replaced the o-ring 6 months ago and the pressure was still low and the oil change showed deposits. I have always used Mobile 1. The pressure test showed no leaks through the cylinder head gasket. This pump solved my problems. The pressure is now 40 at idle and 50/55 while driving. The rattling of the lift is completely gone and so is my engine