The Story
ARP Pro Series ARP2000 Main Stud Kit
For Dodge Ram 5.9L 12V Cummins (1989–1998)
Build your 12-valve Cummins on a foundation that won't budge. The ARP 247-5405 Main Stud Kit is the premier bottom-end upgrade for the legendary 6BT platform. While the 12V is famous for its mechanical simplicity and strength, high-performance tuning and heavy-duty towing can exert enough force to cause "main cap walk," leading to bearing failure or block damage.
By replacing the factory main bolts with proprietary ARP2000® studs, you ensure maximum rigidity and a perfectly aligned rotating assembly, even under extreme combustion pressures.
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Key Features & Benefits
-
ARP2000® Super-Alloy: This kit is an upgrade over standard 8740 chrome moly, featuring ARP2000 material heat-treated to a tensile strength of 220,000 psi.
-
Eliminates Main Cap Walk: High torque and boost can cause the main caps to shift or vibrate against the block. These studs provide the massive vertical clamping force required to lock the caps in place and prevent fretting.
-
Superior Torque Accuracy: Because the stud is stationary and the nut is the only rotating component, you eliminate the "twisting" (torsional) stress associated with bolts, resulting in a more consistent and reliable clamp.
-
Fatigue Resistance: Threads are rolled after heat treatment, giving these studs significantly higher fatigue life compared to hardware with threads cut prior to hardening.
-
Complete Heavy-Duty Kit: Includes a full set of ARP2000 main studs, precision parallel-ground washers, high-strength 12-point nuts, and ARP Ultra-Torque assembly lubricant.
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Why the 12V Needs ARP2000 Bottom-End Strength
The 12-valve Cummins is a favorite for high-horsepower P-pump builds. As you increase fueling and air, the downward pressure on the crankshaft journals becomes immense. If the main caps move even slightly, the oil clearance for your bearings is compromised, which can lead to a spun bearing or even a catastrophic crankshaft failure.
The ARP 247-5405 kit is the "peace of mind" solution for any 12V rebuild. Whether you are building a million-mile tow rig or a 1,200 HP competition truck, these studs provide the structural integrity your block needs to survive.
Machinist Recommendation: Due to the significantly higher clamping force provided by ARP studs compared to OEM bolts, it is highly recommended to have the block line-honed with the studs installed. This ensures the main bearing bores remain perfectly round and true.
Description
ARP Pro Series ARP2000 Main Stud Kit
For Dodge Ram 5.9L 12V Cummins (1989–1998)
Build your 12-valve Cummins on a foundation that won't budge. The ARP 247-5405 Main Stud Kit is the premier bottom-end upgrade for the legendary 6BT platform. While the 12V is famous for its mechanical simplicity and strength, high-performance tuning and heavy-duty towing can exert enough force to cause "main cap walk," leading to bearing failure or block damage.
By replacing the factory main bolts with proprietary ARP2000® studs, you ensure maximum rigidity and a perfectly aligned rotating assembly, even under extreme combustion pressures.
Â
Key Features & Benefits
-
ARP2000® Super-Alloy: This kit is an upgrade over standard 8740 chrome moly, featuring ARP2000 material heat-treated to a tensile strength of 220,000 psi.
-
Eliminates Main Cap Walk: High torque and boost can cause the main caps to shift or vibrate against the block. These studs provide the massive vertical clamping force required to lock the caps in place and prevent fretting.
-
Superior Torque Accuracy: Because the stud is stationary and the nut is the only rotating component, you eliminate the "twisting" (torsional) stress associated with bolts, resulting in a more consistent and reliable clamp.
-
Fatigue Resistance: Threads are rolled after heat treatment, giving these studs significantly higher fatigue life compared to hardware with threads cut prior to hardening.
-
Complete Heavy-Duty Kit: Includes a full set of ARP2000 main studs, precision parallel-ground washers, high-strength 12-point nuts, and ARP Ultra-Torque assembly lubricant.
Â
Why the 12V Needs ARP2000 Bottom-End Strength
The 12-valve Cummins is a favorite for high-horsepower P-pump builds. As you increase fueling and air, the downward pressure on the crankshaft journals becomes immense. If the main caps move even slightly, the oil clearance for your bearings is compromised, which can lead to a spun bearing or even a catastrophic crankshaft failure.
The ARP 247-5405 kit is the "peace of mind" solution for any 12V rebuild. Whether you are building a million-mile tow rig or a 1,200 HP competition truck, these studs provide the structural integrity your block needs to survive.
Machinist Recommendation: Due to the significantly higher clamping force provided by ARP studs compared to OEM bolts, it is highly recommended to have the block line-honed with the studs installed. This ensures the main bearing bores remain perfectly round and true.
