Part Description BACK Mack MP8 (Stock # INJECTOR-31) Camshafts $350.00 Quantity 1 Add to Cart Part Type Camshafts Serial# 85003656 Engine Make Mack Engine Model MP8 Casting# 85003656 Condition Used Description MACK MP8 INJECTORS, QTY 6, #85003656, PRICED EACH.