Qty 12 Exhaust manifold bolt OEM quality DCEC brand replacement for Cummins models All dodge Ram with Cummins engines 5.9L, 6.7L All industrial Cummins engines like 4bt, 6bt, QSB, ISC, ISL, 3.9L, 5.9L, 6.7L, 8.3L, 8.9L Replaces OEM part # 3901448 or # 3944593 Recommend to install high temp Copper anti seize (not included) and follow factory instructions for torque. Note: All manufacturers names, part numbers, and symbols are registered trademarks of these manufactures and supplied for reference purposes only. PB Sales, Inc. is in no way implying that any part listed is the product of these manufacturers or that we are affiliated with any of these manufacturers .