07-cc-24v25-26 Flat tappet conversion kit

Features:

• Forged steel camshaft for tighter grain structure
• DLC-coated tappets reduce friction and wear
• Heavy-duty pushrods rated 3500+ lbs buckling force
• Nearly double the strength of OEM pushrods
• Upgraded rocker arms with DLC-coated trunnion
• Gas carburized ball and foot rockers
• SEMA-certified for 49-state street compliance
• Complete kit, no mixing and matching parts
• Backed by decades of dyno and road testing

Built To Outlast A Factory Valvetrain Under Real Load

If you've spent any time around Cummins guys, you've probably heard Hamilton Cams mentioned as one of the names that actually backs up its claims with real testing. This flat tappet conversion kit for the 2025-2026 6.7L Cummins is built from forged, not machined from bar stock, 178 steel, which gives the camshaft a tighter, more uniform grain structure along with a natural strength-adding halo that forms during the forging process itself. The tappets ride on a diamond-like carbon coating over a gas carburized and polished base, dramatically cutting friction and wear compared to a standard flat tappet setup. Hamilton backs that up with pushrods rated for over 3,500 pounds of buckling force, nearly double what a factory pushrod can handle, which keeps valve timing consistent even when cylinder pressures climb. The rocker arms get the same attention, with a DLC-coated trunnion and gas carburized ball and foot to minimize galling, a common failure point on OEM trunnions. This kit is SEMA-certified for 49-state street use, so you're getting a legitimate performance upgrade rather than a gray-market part. For a stock or mildly built Cummins that needs a flat tappet conversion done right, this is the kind of kit you install once and trust for the long haul.

Precision Forged Components Paired With Strict Oil Requirements

The Hamilton Cams 07-CC-24V25-26 is a complete flat tappet conversion kit engineered specifically for 2025-2026 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins 24V engine. The camshaft is forged from 178 steel rather than cut from bar stock, producing a denser, more uniform grain structure along with a natural surface halo that adds strength and extends service life. Each tappet is gas carburized and polished to create a stable base for its diamond-like carbon coating, a surface treatment that significantly reduces friction but requires specific oil properties to remain intact over time. The included pushrods are rated for over 3,500 pounds of buckling force, compared to roughly 1,800 pounds for a factory pushrod, keeping valve timing accurate under higher cylinder pressures. Rocker arms feature a high-quality casting with a gas carburized ball and foot plus a DLC-coated trunnion to reduce galling and friction throughout the valvetrain. Intake valve lash is set to 0.010 inches and exhaust to 0.020 inches, and both should be rechecked after the first 5 minutes of running and again after retorquing the head. This kit is SEMA-certified for 49-state compliance and is treated by Hamilton as suited for stock or mild builds that stay under 4,000 RPM using OEM valve springs.

Fitment: 2025, 2026 RAM 2500/3500 6.7L Cummins (24V)

Notes:

• Not legal for sale or use in California, SEMA-certified for 49-state street use only
• If your block or cylinder head has been surfaced, call to verify fitment before ordering
• Intake valve lash: 0.010", exhaust valve lash: 0.020", recheck after 5 minutes of running and after retorquing the head
• Requires a specific 15W-40 (or 5W-40 in sub-zero temps) oil with adequate zinc, phosphorus, and molybdenum; see approved oil list
• Using a non-approved oil voids the warranty, all warranty claims require failed parts and an oil sample
• Preferred oil filter: Fleetguard Stratapore LF16035
• Best suited for stock or mild builds staying under 4,000 RPM with OEM valve springs
• High RPM, high spring pressure, or incorrect lash can degrade the DLC coating over time
• Currently on backorder, next availability date is December 1, 2026