Comp Cams
Non-MDS Hydraulic Roller Lifter Set (HEMI)
SKU: 89201-16
View on Comp Cams websiteSkill Level
Install Time
Build Stage
Mounts to
engine →Transmission
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
Price Comparison
Compare prices across 1 retailer — all links go to the real product page
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
For automatic transmission HEMIs with MDS only. Manual trans and SRT8 models already have non-MDS lifters.
Technical Details
Full set of 16 non-MDS lifters. REQUIRED when deleting MDS on automatic HEMI engines.
Compare Alternatives
Other valve springs & lifters for your Challenger
