COMP Cams Evolution HCT Drop-In Roller Lifter
Gen III Chrysler Hemi Engines
85601-16
Overview:
The COMP Cams Evolution HCT (Hydraulic Cartridge Technology) Drop-In Roller Lifter is a revolutionary hydraulic lifter designed specifically for Gen III Chrysler Hemi engines. Engineered to deliver the most consistent and reliable performance available in the aftermarket, these lifters combine advanced technology with durable construction to meet the demands of modern high-performance builds. Ideal for enthusiasts seeking quiet operation, improved responsiveness, and longevity, the Evolution HCT lifters offer a significant upgrade over stock and traditional hydraulic lifters.
Unlike conventional lifters, the Evolution HCT features a patented self-contained hydraulic cartridge that reduces oil volume and minimizes the effects of oil aeration. This design ensures uniform bleed rates across all lifters, resulting in smoother valve operation and enhanced engine efficiency. Additionally, the lifters are serviceable, allowing rebuilds in a home garage, which is a first in the industry for hydraulic lifters.
Key Features:
Designed with cutting-edge technology and precision engineering, the Evolution HCT lifters provide numerous benefits for performance enthusiasts and professional builders alike:
- Patented Hydraulic Cartridge Technology for consistent bleed rates and superior hydraulic performance
- Reduced oil volume within the cartridge minimizes aeration effects and improves responsiveness
- Extremely quiet operation with significantly reduced startup noise
- Stiff lifter body construction reduces distortion and maintains consistent valve timing
- Serviceable hydraulic element allows for easy rebuilds and extended lifter life
- Extra 0.05" height on Gen III Hemi lifters ensures maximum engagement in lifter trays
- Compatible with high RPM applications, delivering reliable performance under demanding conditions
- Designed as a direct drop-in replacement for Gen III Chrysler Hemi engines (excluding Multi-Displacement Systems)
Construction & Design:
The Evolution HCT lifters are built with a focus on durability and precision. The patented hydraulic cartridge is engineered to maintain a smaller oil volume, which enhances responsiveness and reduces the likelihood of lifter noise caused by aerated oil. The lifter body is constructed from high-strength materials to resist distortion under high loads, ensuring consistent valve actuation and longevity. This robust design supports the demanding environments of modern performance engines while maintaining OEM-style fitment and ease of installation.
Performance & Sound
These lifters are among the quietest hydraulic lifters on the market, significantly reducing startup noise and valve train chatter. The controlled bleed-down rate ensures stable valve timing at high RPMs, making them well-suited for performance engines that require both smooth operation and durability. The Evolution HCT lifters provide the quiet operation expected from hydraulic tappets while meeting the higher RPM demands of today’s modern engine builds.
Installation & Fitment:
The COMP Cams Evolution HCT lifters are designed as direct drop-in replacements for Gen III Chrysler Hemi engines. Installation requires no special modifications, making them a straightforward upgrade for enthusiasts and professional mechanics alike. Note that these lifters are not compatible with Multi-Displacement Systems (MDS). The extra 0.05" height on the lifter body ensures proper engagement in the lifter trays and allows for increased lobe lift compared to stock-style replacements.
What's Included:
- Set of COMP Cams Evolution HCT Drop-In Roller Lifters (Part #85601-16)
- Serviceable hydraulic cartridges installed
- Installation instructions and rebuild guidelines
Ideal For:
The Evolution HCT lifters are ideal for performance enthusiasts, engine builders, and racers who demand consistent hydraulic lifter performance at high RPMs without sacrificing quiet operation. They are perfect for upgrading Gen III Chrysler Hemi engines in street, strip, or mild competition applications where reliability, durability, and serviceability are paramount.
