The Silvertop con-rods are incredibly solidly built and with bolts weigh in at 506 grams Each and every (without bearings). The Blacktop was equipped with thinner, lighter and weaker rods which might be 485 grams Every. Both are quickly interchangeable and use the identical fasteners for the main bearing cap, https://4age-blacktop-engine-for59147.fireblogz.com/62700969/4age-20v-blacktop-fundamentals-explained