Seller notes

New Genuine PAI Coolant Tube P/N 691840. Alternative and other replacement reference part numbers: Detroit Diesel 23505899. Applications: Detroit Series 50 and 60. * *PAI p/n 691840 is #27 in the red square in the above diagram. Other parts sold separately, please email for quote. Please Contact us with the Engine Family and Engine Serial Number, if you have any doubt this is the correct part, or please contact your local OEM dealership for correct part # to ensure correct part. Check out my oth...

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