Product Description
Hamilton’s Extreme Duty 12mm pushrods are a proven upgrade for high cylinder pressure Cummins builds. Their 3-piece construction, .120" wall thickness, and large 12mm (0.472") diameter resist deflection, maintain cam timing, and keep valve lift on target under big boost and rpm.
Fitment
- 1998.5–2018 Dodge/Ram 2500 & 3500, 5.9L & 6.7L Cummins 24-valve
- Direct replacement for OEM pushrods; set of 12
Key Specs
- 12mm OD x .120" wall, 3-piece design
- Tested to 3,000+ HP; ~6,600 lb buckling load (vs ~1,780 lb OEM)
- Intended for performance/towing builds that outgrow stock 3/8" pushrods
What’s Included
- (12) Extreme Duty 12mm pushrods
Recommended Complementary Parts
- Hamilton 188/220 Cast Cam Combo (24V): 07-CC-24V188
- Hamilton 178/208 Cast Cam Combo (24V): 07-CC-24V178
- Hamilton Steel Tool Retainers (24V): 07-S-004
- CPP 115# Valve Springs (24V): Shop 24V valve springs
- Head Studs (choose power level): ARP 247-4202 | ARP 247-4204 625+ | Gator HSK5967C | Gator HSK5967C-CS
Cross-Reference / Alternatives
- Fleece 3/8" Stage 2 Pushrods (24V): FPE-CUMM-S2-PROD
- XDP 3/8" Street Performance Pushrods (24V): XD204
- XDP 7/16" Competition Pushrods (24V): XD205
FAQ
When should I upgrade from OEM pushrods?Anytime you add significant boost, cam, or spring pressure. OEM 3/8" pushrods can bend before the valve opens, retarding cam timing and reducing lift. These 12mm rods resist that deflection.
Do I need valve springs with these pushrods?If you’re increasing rpm/boost or running a performance cam, pair with quality 24V valve springs and retainers for proper control (see recommendations above).
Will they work on both 5.9L and 6.7L 24V?Yes—fits 1998.5–2018 24-valve Cummins (5.9L & 6.7L) with OEM length pushrods.
What’s included in the box?One matched set of (12) Extreme Duty 12mm pushrods.
