Pro Series 8620 LS Hydraulic Roller Stage 4 Camshaft

• Fits Compatible GM Gen III & Gen IV LS V8 Engines Including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L & 7.0L

• Stage 4 Camshaft Delivers Maximum Naturally Aspirated Performance & Aggressive Idle

• Hydraulic Roller Design with .604"/.587" Lift & 1,500–6,500 RPM Powerband

• Requires .660" Valve Springs & Uses 3-Bolt Cam Gear Attachment

Upgrade the full performance potential of your GM LS engine with the Top Street Performance Pro Series Stage 4 Hydraulic Roller Camshaft. Designed for serious naturally aspirated street and strip builds, this aggressive camshaft delivers maximum horsepower, exceptional high-RPM performance, and the unmistakable lopey idle that performance enthusiasts demand. Whether you're building a high-performance 6.0L, an LS3-powered muscle car, or a dedicated LS swap project, this Stage 4 camshaft is engineered to maximize airflow and power throughout the upper RPM range.

Featuring 222°/232° duration at .050", .604"/.587" valve lift, a 108° lobe separation angle, and a 1,500–6,500 RPM operating range, this camshaft is designed to improve cylinder filling, increase horsepower, and deliver strong mid-range and top-end acceleration. The aggressive cam profile produces a pronounced performance idle while maintaining excellent performance characteristics when combined with the proper supporting components and professional ECU tuning.

Precision manufactured from premium 8620 carburized nickel-chromium-molybdenum steel, this hydraulic roller camshaft offers outstanding strength, wear resistance, and long-term durability for demanding street, strip, and competition applications. The hydraulic roller design provides reliable valve train operation while the 3-bolt camshaft gear attachment allows installation on compatible GM Gen III and Gen IV LS engines.

This Stage 4 camshaft is an excellent upgrade for 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L LS engines used in Chevrolet Camaro, Corvette, Silverado, Tahoe, GMC Sierra, Yukon, Pontiac GTO, and many LS-powered street rods, restomods, and custom engine swap projects. It is ideal for enthusiasts seeking maximum naturally aspirated performance, a more aggressive exhaust note, and significantly improved upper RPM power.

For optimal performance and reliability, install this camshaft with the required .660-inch valve springs, verify piston-to-valve clearance, inspect timing components, confirm pushrod length, and perform professional ECU tuning. Always verify compatibility with your engine's cam sensor configuration, valvetrain components, and VVT or non-VVT setup before installation.

What engines is this camshaft compatible with?
This hydraulic roller camshaft is designed for compatible GM Gen III and Gen IV LS-based V8 engines, including many 4.8L (293 CID), 5.3L (325 CID), 5.7L (346 CID), 6.0L (364 CID), 6.2L (376 CID), and 7.0L (427 CID) applications. Always verify your engine code, valvetrain configuration, and supporting components before installation.

Is this Stage 4 camshaft suitable for street use?
This Stage 4 camshaft is designed for serious street performance, street/strip, and competition-oriented builds. Its aggressive cam profile provides maximum naturally aspirated performance and a pronounced performance idle. Professional ECU tuning and the recommended supporting components are required for optimal results.

Will this camshaft work in a 5.3L LS truck engine?
Yes. This camshaft is compatible with many 5.3L LS truck engines when installed with the required supporting valvetrain components and proper ECU tuning. Always verify compatibility with your specific engine code and application.

Will this camshaft fit an LS1, LS3, or LS7 engine?
Yes. This camshaft is designed for compatible GM Gen III and Gen IV LS engines, including many LS1, LS2, LS3, LS6, and LS7 applications. Always verify your engine configuration before installation.

Does this camshaft require upgraded valve springs?
Yes. This camshaft requires .660-inch performance valve springs to provide proper valve control and reliable operation at higher engine speeds.

Is ECU tuning required after installation?
Yes. Professional ECU tuning is strongly recommended after installing this camshaft to optimize idle quality, fuel delivery, ignition timing, drivability, and overall engine performance.

What are the camshaft specifications?
This Stage 4 hydraulic roller camshaft features 222°/232° duration at .050", .604"/.587" valve lift, a 108° lobe separation angle (LSA), and an operating range of approximately 1,500–6,500 RPM.

What material is this camshaft made from?
The camshaft is precision manufactured from premium 8620 carburized nickel chromium molybdenum steel for exceptional strength, durability, and wear resistance in demanding high-performance applications.

Is this a hydraulic roller camshaft?
Yes. This is a hydraulic roller camshaft designed for compatible GM Gen III and Gen IV LS engines equipped with a hydraulic roller valvetrain.

Is this camshaft a good choice for an LS swap?
Yes. This Stage 4 camshaft is an excellent choice for high-performance LS swap projects, including muscle cars, street rods, Pro Touring builds, drag cars, and custom performance vehicles using compatible LS engines.

Will this camshaft have a lopey idle?
Yes. The aggressive Stage 4 cam profile and 108° lobe separation angle (LSA) produce a pronounced lopey idle while delivering strong mid-range torque and maximum upper-RPM horsepower. Idle characteristics will vary depending on engine displacement, compression ratio, cylinder heads, exhaust system, and ECU tuning.

What supporting modifications are recommended?
For optimal performance, install this camshaft with .660-inch performance valve springs, inspect or replace the timing set as needed, verify piston-to-valve clearance and pushrod length, and perform professional ECU tuning. Upgraded pushrods and other valvetrain components are also recommended for demanding performance applications.