Scat Pro Comp series I-beam stroker clearanced connecting rods. SBC 350-400 applications made of 4340 forged steel, 5.700″ length, bronze .927″ I.D. bushed small end, 2.100″ crank pin. ARP 8740 7/16″cap screws, rod weight 590 grams and big end width .941″ rated for up to 7500 rpms and 700hp. Piston assembly weight (piston, rings, pins & locks total 530 grams.) This set is New Old Stock item new old stock with missing factory box. Please e-mail with questions.