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Manley Pro Series I‑beam connecting rods, center‑to‑center 6.125 in, are heavy‑duty rods offered for SBC and LS/LT1 applications with 7/16" ARP 625+ bolts and pin bore and big end dimensions specified for exact fitment. They’re forged from 4340 or 300M vacuum‑degassed steel alloys and carry an approximate HP rating listed per application. Engineered for high‑end builds, some SKUs carry NHRA legal certification and multiple weight options are available.
Manley SBC .025in Longer LS/LT1 6.125in Pro Series I Beam Conn Rod 7/16in ARP 625+ - Set of 8
