If your running stock crank and rods than OEM!! I find that if your clearances are 100% correct, than oil flows much better when OEM bearings are used. Also heard that ACL is very good value for money. Just be careful when buying, I always hear stories from people buying cheap brand bearings and destroying there bottom end. Either the material which it is made of cannot withstand the heat and burns through the oil, or the inner side of the bearing flakes away, again because of cheap materials or incorrect clearence measured.