The Silvertop con-rods are very solidly crafted and with bolts weigh in at 506 grams Just about every (devoid of bearings). The Blacktop was fitted with thinner, lighter and weaker rods that are 485 grams each. Each are readily interchangeable and use the same fasteners for the main bearing cap, https://bookmark-dofollow.com/story21150885/the-2-minute-rule-for-jdm-toyota-4a-ge