The Silvertop con-rods are quite solidly crafted and with bolts weigh in at 506 grams each (devoid of bearings). The Blacktop was fitted with thinner, lighter and weaker rods that are 485 grams each. Both are commonly interchangeable and use the identical fasteners for the main bearing cap, as such https://socialexpresions.com/story3991455/the-smart-trick-of-toyota-4a-ge-that-nobody-is-discussing