What part number am I looking for on the extreme duty fan clutch?

Summit has the Hayden Automotive 2797.

Will that work? Wanna replace my stocker....

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2005 CRD Limited
Samco CAC's
GDE Hot tune
Racor Fuel filter
Transgo shift kit
Hayden Extreme Duty fan clutch
Timing belt done at 112K

According to my notes from past forum posts you want the Hayden severe duty 2905

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

That's the one I have in the shed (I'll fit it when the weather gets warmer).

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Light Khaki 2.8CRD: TJM alloy bumper; Skid Row &Asfir skids;ext. breathers; SAMCO hoses; Grabber At3 235/70/16; Fumoto; Euro TC; Odyssey PC1500;GDE FTEcotune; OME lift; lightforce driving lights;ARB diff cover;nylon fan+Hayden2905;ss vortex exhaust; Airflow snorkel; Frontrunner roofrack; rock rails

The Hayden severe duty 2905 along with the V6 plastic blade fan (designed for towing) keeps my engine cool in hot weather and due to the fan clutch disengageing in cooler weather, does not effect mileage.
Another benefit is that the AC works better in congested traffic as well as speeds below 45MPH.
The steel fan as far as I am concerned is another Bean Counter Engineering fiasco along with the crappy fan clutch.

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2006 Pearl Green CRD
Magnaflow 2 1/2" Cat Back
KJ Extra Leg Room Brackets, Carter Lift Pump, V6 Airbox, ORM
Fuel cooler, Oil Separator, Progard 7
Gauges EGT Boost Trans Temp Oil Pres, Michelin LXT AT2 245 70 R16
7,000# Draw Tight hitch, PML EX Deep Trans Pan
Centrifuge, SunCoast, Transgo, RAM TCM, InMotion Stage 2
Wife's 99 TDI VW Beetle