681121 Intake Manifold for DETROIT Diesel Series 60 and PETERBILT Applications

The 681121 intake manifold is designed for Detroit Diesel Series 60 intake manifold applications and is also listed for several Peterbilt models. It helps distribute intake air evenly into the engine for proper combustion and performance. Always confirm fitment by engine family and vehicle application before ordering.

Yes, the 681121 intake manifold is specified for Detroit Diesel Series 60 intake manifold use. Because Series 60 configurations can vary by year, displacement, and emissions equipment, verify the part number and any EGR-related differences against your engine information. Matching the correct diesel engine intake manifold is important to prevent boost leaks and drivability issues.

The product listing indicates compatibility with multiple Peterbilt applications, including models where a Peterbilt 325 intake manifold or Peterbilt 389 intake manifold may be required. Fitment can still depend on the specific Detroit Diesel Series 60 configuration installed in the truck. If you’re cross-referencing PAI 681121, compare the SKU/MPN and any casting or port details to your existing manifold before purchase.