Product Description

ARP 247-5405 MAIN STUD KIT WITH FACTORY BLOCK STIFFENER FOR 2007.5–2018 6.7 CUMMINS

LOCK DOWN YOUR 6.7L BOTTOM END. The ARP 247-5405 Main Stud Kit is engineered specifically for 2007.5–2018 Dodge/Ram 6.7L Cummins engines equipped with the factory block stiffener (girdle). ARP’s premium 8740 chromoly studs deliver exceptional clamping force and repeatable torque for track, tow, or everyday reliability.

• Direct-fit for 6.7 Cummins with factory block stiffener (2-bolt mains)
• 8740 chromoly studs, heat-treated and centerless ground
• Rolled threads after heat-treat for superior strength and fatigue life
• Includes hardened parallel-ground washers and 12-point nuts
• Compatible with ARP Ultra-Torque for precise preload

Pair this kit with ARP head studs when pushing boost or heavy towing to keep your Cummins sealed and stable.

ARP 247-5405 main stud kit, 6.7 Cummins main studs, Dodge Ram bottom end studs, factory girdle block stiffener, Cummins main cap fasteners, ARP studs 8740 chromoly, CPP Diesel ARP Cummins studs, 2007.5-2018 Ram 2500 3500

FITMENT

• 2007.5–2018 Ram 2500/3500 with 6.7L Cummins (24V), with factory block stiffener/girdle

RECOMMENDED ARP ADD-ONS (CPP DIESEL)

• ARP 100-9909 Ultra-Torque Assembly Lubricant
• ARP 100-9910 Ultra-Torque Assembly Lubricant 10oz
• ARP 247-4202 Head Stud Kit (5.9/6.7 Cummins)
• ARP 247-4204 625+ Head Stud Kit (5.9/6.7 Cummins)

CROSS-REFERENCE (CPP DIESEL)

• ARP 247-5401 Main Stud Kit (without factory stiffener)
• ARP 247-5403 Main Stud Kit (5.9/6.7 with stiffener)

FAQ

Q: Will this fit trucks without the factory block stiffener?
A: No. Use ARP 247-5401 if your engine does not have the stiffener plate.

Q: Do I need ARP Ultra-Torque during installation?
A: Yes. ARP specifies using Ultra-Torque to achieve accurate preload and consistent torque readings.

Q: Can I reuse my factory bolts?
A: Studs are recommended over bolts for improved clamping and thread protection during service.

Q: Does this kit include nuts and washers?
A: Yes—hardened parallel-ground washers and 12-point nuts are included.

SPECIFICATIONS FOR ARP 247-5405

Note: Follow ARP’s installation procedure and torque specs. Use the proper thread chaser and ARP Ultra-Torque for accurate preload.