FLEECE FPE-34772 EXHAUST MANIFOLD STUD KIT – 4MM ALLEN SOCKET HEAD FOR 5.9L/6.7L CUMMINS

Fleece FPE-34772 Exhaust Manifold Stud Kit – 4mm Allen Socket Head

The FLEECE FPE-34772 Exhaust Manifold Stud Kit – 4mm Allen Socket Head is a premium stainless steel hardware upgrade for your 5.9L or 6.7L Cummins. Designed to replace weak or corroded factory hardware, this kit delivers higher clamping force, simplified installation, and long-term resistance to rust and heat cycling. Whether you are installing an aftermarket exhaust manifold or refreshing a tired stock setup, these Fleece Performance studs keep your manifold sealed and secured under towing, racing, and daily driving.

Each stud features a 4mm internal Allen socket head, making it easy to thread into the cylinder head in tight engine bays without fighting clearance issues around the manifold runners. Paired with 12-point nuts and washers, this is a complete, ready-to-install kit for serious Cummins owners who want rock-solid reliability and clean, professional hardware.

Key Features & Benefits

• All-new stainless steel exhaust manifold stud kit specifically for Cummins engines.
• Higher clamping force than stock hardware to help prevent exhaust leaks.
• 4mm internal Allen socket head for easy installation in tight spaces.
• Includes matching 12-point nuts and washers for a complete hardware solution.
• Manufactured from aged 603 stainless steel for maximum corrosion resistance.
• Engineered to handle repeated heat cycles, towing loads, and performance use.
• Direct-fit hardware for popular 5.9L and 6.7L Cummins model years (see fitment below).

Fitment

Engine & Vehicle Coverage:

• Cummins 5.9L 12V (1994–1998) – aftermarket exhaust manifold only
• Cummins 5.9L 24V (1998.5–2002)
• Cummins 5.9L 24V (2003–2007) – requires removal of the factory heat shield
• Cummins 6.7L 24V (2007.5–2018)

This stud kit is ideal for Dodge/Ram 2500 and 3500 trucks running upgraded or replacement exhaust manifolds. Always verify manifold flange thickness and thread pitch before installation.

Installation Notes

• Clean all cylinder head threads and chase if necessary before installing studs.
• Thread studs into the head using a 4mm Allen/hex key until snug – do not over-tighten into the head.
• Apply a quality high-temp anti-seize to the stud threads before installing nuts.
• Recommended nut torque: 40 ft-lbs using anti-seize (follow Fleece’s instructions and re-check torque after the first full heat cycle).
• For 2003–2007 5.9L trucks, remove the factory manifold heat shield for proper stud/nut clearance.

Cross-Reference & Related Fleece Products

Pair the FPE-34772 manifold stud kit with other Fleece Performance upgrades available at CPP Diesel:

• FLEECE FPE-34771 Exhaust Manifold Stud Kit – 7mm External Hex Head – Same applications with a 7mm external hex head instead of 4mm Allen.
• FLEECE FPE-34755 Fuel System Upgrade Kit with PowerFlo Lift Pump for 03–04 Dodge Cummins – Fuel system upgrade that pairs well with improved exhaust flow.
• FLEECE FPE-34783 2003–2018 Dodge Cummins Auxiliary Fuel Filter Kit – Additional filtration protection for performance builds.
• FLEECE FPE-FH-CUMM-GM Fuel Heater for GM/Cummins Filter Bases – Helps keep winter fuel flow consistent on modified Cummins trucks.

FAQ

Yes, as long as your engine falls into the listed applications: 5.9L 12V (1994–1998) with an aftermarket exhaust manifold, 5.9L 24V (1998.5–2002 and 2003–2007 with heat shield removed), or 6.7L 24V (2007.5–2018). If you are unsure about your year split or manifold style, match your model year and engine to the fitment list above before ordering.

Factory hardware is prone to corrosion, stretching, and loosening under high heat and load. The FPE-34772 kit uses aged stainless studs, 12-point nuts, and hardened washers that provide higher clamping force and better resistance to rust and heat cycling. This helps reduce exhaust leaks, warped flanges, and broken fasteners over time.

Yes. On 2003–2007 5.9L Cummins applications, the OEM heat shield interferes with stud and nut clearance. Removing the shield ensures proper torque access and prevents contact between the hardware and shield, which could cause noise or loosening over time.

Fleece recommends torquing the 12-point nuts to approximately 40 ft-lbs using a suitable anti-seize compound. It is good practice to re-check torque after the first full heat cycle (after the truck has been brought up to operating temperature and allowed to fully cool). Re-torquing helps account for gasket crush and thermal settling.

The studs are made from aged 603 stainless steel, which offers excellent resistance to rust and corrosion compared to standard carbon steel hardware. When installed with quality anti-seize, they are far less likely to seize in the head or on the nuts, making future manifold service and turbo work much easier.

Specifications