I'm interested in what the weaknesses are for the LQ4s. I am building an 03 twin turbo LQ4 for my Z32 and I'm wondering if I should replace anything. I am putting in ARP Main Studs, ARP Head Studs, ARP Rod Bolts, A.R.E. 4-Stage Dry Sump System, and an LS2 intake manifold/throttle body. I only plan to run 7-10 p.s.i. so I don't think I'll have any problems but I figured I should ask since the motor will be out for a while longer. Thanks guys!