Roller Cam Kit - 03-08 5.7L Hemi Stg 3

The COMP CAMS Roller Cam Kit for 03-08 5.7L Hemi Stage 3 is engineered for builders and performance enthusiasts seeking a measurable power increase without sacrificing engine reliability or drivability. This Stage 3 roller cam system bridges the gap between street performance and serious track duty, delivering aggressive valve timing and lift characteristics that maximize airflow through your Hemi's cylinder head. Built for owners who demand more from their 5.7L platform—whether for weekend cruising with noticeable responsiveness or sustained high-RPM capability—this kit transforms how your engine breathes and responds to throttle input.

At the core of this kit is COMP CAMS' proven roller cam technology, which reduces friction and wear compared to flat-tappet designs while enabling higher lift and more aggressive ramp rates. The Stage 3 profile increases valve opening duration and overlap, promoting scavenging and volumetric efficiency across the mid to upper RPM band. This kit includes all necessary components—cam, lifters, and timing gear—to ensure proper installation and harmonious integration with your Hemi's valvetrain. The roller design not only improves reliability under sustained boost and high load but also allows tighter valve events without the flat-tappet's mechanical limitations.

This roller cam kit is ideal for 2003–2008 5.7L Hemi owners building stroker engines, naturally aspirated hot rods, or supercharged applications where quality valvetrain components are non-negotiable. Installation requires standard machine work and attention to valve clearance; professional installation is strongly recommended to ensure proper lobe centerline and lifter preload. The comprehensive nature of this Stage 3 kit—with matched cam, lifters, and timing hardware—eliminates compatibility guesswork and delivers the aggressive power band these Hemis are known for. Whether you're upgrading a daily driver for more spirit or finishing a dedicated performance build, COMP CAMS' reputation for durability under extreme conditions makes this a trusted choice among serious Hemi tuners and engine builders.