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Comp Cams
Non-MDS Hydraulic Roller Lifter Set (HEMI)
SKU: 89201-16
Skill Level
Install Time
Build Stage
Mounts to
engine →Transmission
Estimated Install Cost
Total with part: $1,180–$1,930
What You'll Need
Required for cam swap on automatic trans HEMIs. Not needed on manual trans.
Enthusiasts looking to improve their Challenger's performance
Compatible Vehicles
Fits 5.7L and 6.4L HEMI with MDS. Manual trans Challengers do NOT have MDS — not needed.
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Why Install This?
Things to Know
- Professional installation recommended — requires specialty tools or expertise
What Does This Do?
The factory HEMI has MDS (Multi-Displacement System) lifters that can collapse to deactivate 4 cylinders during light driving. These MDS lifters are completely incompatible with aftermarket camshafts — the cam profiles will cause the MDS mechanism to malfunction, leading to lifter failure, collapsed lifters, and engine damage. Non-MDS lifters are solid hydraulic rollers that follow the cam lobe faithfully without any deactivation mechanism. If your Challenger has an automatic transmission, it has MDS and you MUST replace all 16 lifters when installing an aftermarket cam. Manual transmission models already have non-MDS lifters.
Fitment Notes
Fits 5.7L and 6.4L HEMI with MDS. Manual trans Challengers do NOT have MDS — not needed.
Technical Details
Full set of 16 non-MDS lifters. REQUIRED when deleting MDS on automatic HEMI engines.
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