Serpentine belt idler pulley for any 93 850 (up to engine # 121320 without EGR to engine #122376 w/EGR and standard transmission to engine #121674 w/out EGR to engine # 122376 w/EGR and auto trans and 960 92-93 to eng# 121674 w/out EGR to engine #122376 w/EGR.
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