Johnson Lifters ST2326 - Drop-in Gen III Hemi Lifters

Description

Upgrade the valvetrain stability, high-RPM horsepower, and valve control in your modern Mopar build with the Johnson Lifters Gen III Hemi Drop-In Short Travel Hydraulic Roller Lifter Set (Part # ST2326 / JLCST2326). Precision-manufactured 100% in the USA from heat-treated alloy steel, these premium non-MDS lifters deliver solid-roller-like stiffness and precision with the quiet operation and zero-maintenance convenience of a hydraulic roller design.

Engineered with Johnson’s proprietary Short Travel (.058 in.) plunger design, the ST2326 drastically limits internal oil volume and plunger deflection. This tight-tolerance hydraulic valving prevents lifter collapse during heavy valve spring loads and eliminates high-RPM pump-up, allowing your Gen III Hemi to rev cleanly past 7,000+ RPM without valve float. Configured specifically as a drop-in non-MDS lifter, this set is compatible with factory OEM non-MDS lifter guide trays for a straightforward, reliable installation.

Core Technical Specifications

Engine Compatibility & Application Fitment

• Supported Engines: All 2003+ Gen III Hemi architectures:
  • 5.7L Hemi: 2003–2008 Non-VVT and 2009+ Eagle VVT (requires non-MDS conversion trays)
  • 6.1L SRT Hemi: 2005–2010 Non-VVT
  • 6.2L Hellcat / Demon / Redeye: Factory supercharged applications
  • 6.4L 392 Apache Hemi: 2011+ VVT passenger cars, SUVs, and HD trucks
  • Mopar Performance 426 / 440: Gen III Hemi crate motors and big-inch strokers
• MDS Delete Upgrades: Mandatory drop-in upgrade when disabling the Multi-Displacement System (MDS) on 5.7L and 6.4L platforms for high-performance camshaft upgrades.
• Induction Types: Highly recommended for naturally aspirated race builds, nitrous setups, and high-boost centrifugal or positive-displacement supercharged combinations.

Crucial Installation & Preload Guidelines

• Preload Window: Recommended cold lifter preload is .025 in. to .030 in. from zero lash. Because these are precision Short Travel lifters (.058" total travel), strict adherence to preload tolerances is critical.
• Pushrod Length Check Required: Never assume factory pushrod lengths will provide correct preload. Because base circle diameters, deck surfacing, and gasket thicknesses vary, always measure pushrod length with an adjustable length checker across both intake and exhaust valves during assembly.
• Guide Trays: Designed for use with OEM Mopar non-MDS lifter guide trays (Part # 05038785AA / 05038786AA or equivalent). Inspect guide trays for distortion, wear, or cracks before installing lifters.
• Lubrication & Priming: Generously coat lifter bodies and roller wheels with quality high-pressure assembly lubricant. Do not pump up lifters with oil prior to installation to ensure accurate zero-lash measurements.