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4943977 Connecting Rod, Forged 4340 Alloy Steel, 190.5 mm Center-to-Center — replacement for Cummins QSB6.7 engines in excavators, gensets, and agricultural machinery. Plan rod renewal at overhaul intervals to prevent downstream crankshaft and bearing damage from fatigued components Typical triggers include bearing shell scoring, cap bolt stretch beyond 0.22 mm, and visible fretting at the cap-to-rod interface Align replacement with crankshaft inspection and con-rod bearing grade selection for matched tolerances Older QSB6.7 platforms remain continuously supported through our long-term aftermarket supply commitment.