Pro Series 89-98 Ram Cummins 5.9L 12V Diesel Cylinder Head Stud Kit

• 35 Chromoly studs deliver stronger, more consistent head clamping force

• 12-point nuts for accurate, repeatable torque-down on 12V Cummins builds

• Fits 5.9L 12V Cummins (1989–1998) only — not for 24V engines

• Complete stud kit built for 12V Cummins performance & 6BT swap applications

Upgrade your 12V Cummins diesel with a Pro Series head stud kit built to handle the clamping demands of performance builds, towing, and 6BT swap applications. Stud-style fasteners help guide the cylinder head into precise alignment during assembly while distributing clamping force more evenly across the head gasket than factory-style bolts, reducing the risk of gasket failure under sustained load or elevated cylinder pressure.

Machined from 35 chromoly steel with a minimum 190,000 PSI tensile strength, each stud is thread-rolled after heat treatment for added fatigue resistance. A black oxide finish with an oil coating protects the kit from rust and corrosion in daily-driven and heavy-use applications alike.

This kit is designed specifically for 12-valve Cummins inline-six diesel engines — 5.9L (1989–1998) — and is a popular choice for 6BT swap and performance diesel builds. Not compatible with 24V Cummins engines unless specifically confirmed.

Applications
Engineered for Dodge/Ram Cummins 12V diesel inline-six engines: 5.9L / 359 ci (1989–1998, 6BT). Covers Ram 2500 and Ram 3500 trucks from this era, and is also a common choice for Cummins 6BT swap builds outside the factory chassis. Not compatible with 24V Cummins engines.

Installation
Verify model year, block, cylinder head, and gasket combination before installation, since 12V Cummins builds vary more in head/gasket configuration than later 24V engines. Follow the correct torque sequence and any re-torque interval specified for your engine. Studs help align the cylinder head during setup, simplifying placement compared to loose bolts.

Will this stud kit fit a 1994 Ram 2500 with the 5.9L 12V Cummins?
Yes. This kit is designed for the 12V Cummins 5.9L (1989–1998), which covers the 1994 Ram 2500.

Does this kit work with a 24V Cummins?
No. This kit is built specifically for 12-valve Cummins engines and is not compatible with 24V Cummins applications.

Can I use this kit for a Cummins 6BT swap into a non-Dodge chassis?
Yes. This kit is commonly used for 6BT swap builds in addition to factory Ram 2500/3500 applications — verify your specific block and head combination before installation.

Will these studs help prevent head gasket failure on a towing or performance build?
Yes. The stud-style design distributes clamping force more evenly across the head gasket than factory bolts, helping maintain sealing under higher cylinder pressure and sustained load.

Are these studs chromoly steel, or a lower-grade material?
They're machined from 35 chromoly steel with a minimum 190,000 PSI tensile strength, with threads rolled after heat treatment for added fatigue resistance.

Does this kit include the nuts, or are those sold separately?
The kit includes 12-point nuts along with the studs — no separate nut purchase is needed.

Do I need to verify anything else before installing this kit?
Yes. Because 12V Cummins engines varied in block, cylinder head, and gasket combination across model years, confirm your specific configuration before installation.