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External Engine Parts

Grid heater delete, radiator hoses, breathers, and more! From Cummins, Glacier Diesel, BD Power, Banks, and Mopar.

2003-2007 Dodge Cummins external engine upgraded and replacement parts.

Custom Side Draft Intake Manifold for the 03-18 Cummins 5.9L or 6.7L Features: Equal Air Distribution Outflows Competitors...


Features Pump to Pump Design for Ease of Installation, Better Looks, and More Efficiency Custom Billet Wheel (with optional polishing) Custom...


Introducing our Freedom Series cylinder heads - Give new life to your engine with our fully remanufactured Cummins cylinder head. Each head is...


Part is item #2 in the picture only. Part Number: PDP4090102


Help Eliminate Excessive Crank Case Pressure With The PDP Oil Cap Breather Kit! We made a replacement for the current breathers on the market that did...


Dress up your Cummins with this billet aluminum oil cap cover. It is anodized black and laser etched with the Fleece Performance "F". It is a great...


Stainless steel 5/8" boost bolt tapped for 1/8" senders or fittings. Great for installation of boost gauges without having to drill and tap your manifold....

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Installing a new exhaust manifold, or simply removing a stock or aftermarket manifold to change gaskets? If so, you'll find that it is a real hassle to keep...


From Bosch Bosch

Old Style Fuel Connector Tube for 2003-2007 Cummins 5.9L Diesel Includes O-rings. *Price is for one, 6 are needed for complete set. Bosch...

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'03-'07 5.9L "Air-Boss CR" Intake Plenum Cover & Grid Heater Delete Kit

EGT's running too high? Can't use all of the fuel you have available? The GDP Air-Boss intake plate gives the largest flow increase possible short of milling the cast plenum off the head and installing a fabricated intake plenum such as the ZZ Fab unit.

The Air-Boss plenum isn't just a replacement flat aluminum plate as seen in other designs. The Air-Boss is a true, elevated plate designed to flow as much air as possible to cylinders 4, 5, and 6. We've all have seen the head gasket failures between the hottest running #5 and #6 cylinders. With our plate design we open up the plenum area to the starving rear cylinder by a full 30%. By increasing airflow to the rear cylinders we reduce EGT's and allow you to run even higher fueling levels.

The Air-Boss plenum kit also includes a shortened grid heater delete block to maintain the factory IC piping to intake manifold connection geometry . Maintaining this geometry makes the Air-Boss plenum compatible with ALL aftermarket intake manifolds and the stock mounting hardware.

Grid Heater options:

A) The standard Air-Boss CR kit includes a custom height grid heater delete block.

B) For colder climates we now offer the Air-Boss CR with a grid heater option. This option uses the factory grid heater (no delete included) and custom length stainless steel studs to accomodate the increased plenum height of the Air-Boss CR.

C) For customers that want to swap back and forth between the heater and delete block we offer both item in one package.


Kit includes Air-Boss intake plate, factory gaskets, custom height grid delete block and/or optional stainless steel studs, and shortened injector line retaining brackets.

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