1. Lift Bolts - I believe the lift bolts were revised by the time the Sportivo engine came out. 2. Over-Rev due to Missshifting - At the end of the day, it comes down to driver error. I don't know any engine that would look very healthy when you are at 8,200 rpm and you hope to go up to 5th and accidentally slot into 3rd. 3. Valve Springs - The guys here running the Apexi PFC have found an 8,500-8,600 RPM rev limit to be OK, it's only once you start to push 9,000 and beyond they problems arise. 4. Rod Bearings - I believe this is one of the reasons that Toyota recommend changing the oil every 5000 kms on these engines. I haven't look into alternatives but if/when I get the engine stroke kit they will of course be changed. 5. Oil Starvation - I'm getting the Moroso sump myself... no questions there at all. 6. Oil Pump Gear - prevention again here, it far better then the cure. Simply don't allow the pump to pass any air (see no. 5)