The Silvertop con-rods are quite solidly built and with bolts weigh in at 506 grams each (without the need of bearings). The Blacktop was fitted with thinner, lighter and weaker rods that are 485 grams Each individual. Equally are easily interchangeable and use the same fasteners for the leading bearing https://andyrpoli.blogacep.com/36549000/little-known-facts-about-4age-20v-itb