P7100 Injection Pump Gear Nut
Available Options
$39.16
- Part Number: 3920921
- Est. Ship Time: Usually Ships By Next Business Day
SSL SECURE
TRANSACTION
AUTHENTIC
PRODUCTS
GUARANTEED PREMIUM
QUALITY
A+ Rating
More from this brand
Starting From $204.10
Cummins: 3920921
Item number 6 in the picture.
Backordered until February (Updated 9/22/25)
Dowel Pin fell? Chances are your timing case/gear housing got cracked in the process as the gears tend..
$829.68
12 Valve Second Generation Mechanical Lift Pump
OEM Replacement
1994-1998 Dodge 5.9L 12 Valve Cummins
Cummins part number: 4988747
If you want..
$193.98
5.9L 12 & 24 Valve Cummins 6BT Oil Pump
This pump will bolt right into your 12 or 24 valve Cummins engine and is a higher volume pump than the ..
$180.71
Dodge Ram Cummins 94-98 Second Gen 5.9L Injector Set: Stage 2 injector set, injectors will support up to 550 RWHP with proper supporting mod..
$831.25
89-02 Dodge 5.9L Cummins Gear Housing Gasket
This gasket installs between the timing gearcase housing and the block. (this is the really hard to get ..
$43.30
94-02 12 & 24 Valve 5.9L 2nd Gen Cummins Front Timing Cover GasketCummins: 3918673..
$81.17
94-98 12 Valve Cummins Gear Housing Dowel Pin
This can be used in place of the infamous "killer dowel pin". We still recommend a retainer tab to avoi..
$18.36
.020 Over Marine Head Gasket 1989-1998 Dodge 12 Valve 5.9L Cummins Diesel.
Overall thickness: 2.78mm
Cummins: 3283339..
$354.46
Includes:
Standard Thickness Head Gasket
Intake Gasket (long rectangular)
Exhaust Manifold Gaskets
Valve Cover Gasket
Valve Seals (new style va..
$665.72
Performance Override Switch - more commonly known as the "Valet" Switch
Override the power of your vehicle with the flick of a switch! By..
$141.96
Replacement plastic timing pin with sealing o-ring.
Choose option above if you would like the retainer ring included. (part number 3904849)
Cumm..
$25.12
94-07 5.9L Dodge Cummins Small Square Heater Grid Intake Gasket
Cummins: 3969988..
$11.38
12-60lb Intake & Exhaust Valve Springs 89-98 12 Valve Dodge 5.9L Cummins
The seat pressure on these springs is ~150bs at the installed height o..
$275.76
Not running a mechanical lift pump anymore?
This plate will bolt right in place of your stock lift pump, blocking off the port.
Includes #2 in ..
$21.18
94-98 12 Valve Cummins "Killer" Dowel Pin Tab AKA KDP tab
Cummins: 3958017..
$7.17
Using this lower connecting rod bearing directly from Cummins will retain factory fit and function. This is an OE replacement and installs directly in..
$34.57
First generation (1989-1993 Dodge 5.9L VE Cummins) mechanical fuel lift pump.
Lift pump only. Don't forget to get gaskets! This pump supplies 3-5PSI ..
$204.10
Cummins part numbers:
Thermostat: 3928499
Seal: 3925466
Seal: 3927305 ..
$103.43
Includes thermostat only, with seal ring.
Image for reference only.
Cummins part number: 5292742..
$68.36
Genuine Cummins 5.9L Engine overhaul kit includes:
Pistons
Bushing clips
Upper engine gasket set
Lower engine gasket set
Rod bearings
..
$3,818.63
2003-2005 Dodge 5.9L Cummins Valve Cover
This valve cover DOES NOT have CCV breathers.
May fit other applications including some 6.7L Cummins QS..
$319.26
Cummins front crank main seal. Includes seal driver installation ring.
Cummins 3804899..
$88.88
Includes head gasket only. (Thick, dual hole gasket)
Cummins: 3958645..
$288.13
Includes head gasket only. (Thin, single hole gasket)
Cummins: 3958644..
$258.00
Cummins oil pressure regulator threaded plug for 03-18 5.9L and 6.7L Cummins trucks.
May also be used in other applications
Cummins: 394694..
$21.62
Cummins rocker box bolt set for 03-18 5.9L and 6.7L Cummins applications
Includes
3900678 (2)
3903096 (5)
Cummins: 2x3900678/5x39..
$58.69
Using this upper connecting rod bearing directly from Cummins will retain factory fit and function. This is an OE replacement and installs directly in..
$33.46
Options for standard/upgraded parts are available above
Genuine Cummins 5.9L Engine overhaul kit includes:
Pistons w/Rings
Bushing clip..
$5,907.79
Direct fit OEM cummins rocker box for 05-18 Dodge 5.9L And 6.7L Cummins applications
Cummins: 3974981..
$346.29
This Cummins captive isolator cap screw is primarily used in 06-18 5.9L 6.7L Cummins applications on the rocker cover. Sometimes it is also refer..
$22.35
94-98 P7100 Injection Pump Fuel Shutoff Solenoid Lever
This is ONLY the lever that bolts on the pump.
Bosch part number: 2422002082..
$116.66
Cummins P7100 Woodruff Key for the throttle lever arm.
This is a TINY woodruff key, it goes on the shaft that the shutoff lever pivots on.
This it..
$3.99
Includes item number 24 in second picture.
This item has *Right Hand Thread & is 1.25" Long-
We are not responsible for return sh..
$21.21
ONLY number 23 from second picture.
This item has *Left Hand Thread & is 1.25" Long- We are not responsible for return shipping or expeditin..
$77.13
Increase power and torque in your 1994-1998 5.9L Cummins 12 valve by simply replacing the stock fuel plate with one of our custom ground Fuel Cam Plat..
$142.54
This is the part that gets destroyed if your starter sticks on. If your solenoid burned up you should replace the starter contacts or install a L..
$111.99
This brass bellcrank bushing replaces the flimsy OEM plastic bushings on P-pump engines. Use this bushing set to eliminate shaft wobble from worn bush..
$29.95
Simplify removing and reinstalling delivery valves with this socket. This tools makes working on delivery valves easy, ensures secure installation, an..
$69.95
94-98 Dodge 5.9L 12 Valve Cummins Diesel Accelerator Linkage Assembly (OEM)
Replaces Mopar- 5011849AB
Cummins- 3932317..
$208.78
AIR DOG AND FASS PUMP USERS
INCREASE YOUR HORSE POWER AND FUEL PRESSURE
WITH YOUR P7100 CUMMINSFor stock fuel systems, please check out OFV010 ..
$27.95
Cummins Adjustable Overflow Valve for the Bosch P7100 Injection Pump
By Tork Tek
ALL THE PROBLEMS WITH THE BOSCH OVERFLOW VALVE HAVE BEEN S..
$54.49
Cummins Adjustable Overflow Valve for the Bosch P7100 Injection Pump
By Tork Tek
ALL THE PROBLEMS WITH THE BOSCH OVERFLOW VALVE HAVE BEEN S..
$57.19
This plug will increase your rack travel for more fueling on your P7100 pump.
AFC modifications are required to get the most out of this plug.
T..
$14.95
Genuine Bosch overflow valve for P7100 Pump
This overflow valve regulates the primary pressure inside the injection pump. If this pressure is not w..
$103.52
Includes ONLY item #21 in second picture.
Cummins: 3933130..
$109.47
