Melling 22503 GM LS Class V Hydraulic Roller Camshaft .625/.610 Lift 239/237 Duration

The Melling 22503 is a Class V High Performance Hydraulic Roller Camshaft engineered for turbocharged GM LS engines including the 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L Gen III/IV platforms. Designed for serious street/strip and forced induction builds, this billet camshaft delivers an aggressive power profile suited for high-output LS applications.

Camshaft Specifications:

• Cam Style: Hydraulic Roller
• Intake Valve Lift: 0.625 in.
• Exhaust Valve Lift: 0.610 in.
• Intake Duration @ 0.050 in.: 239°
• Exhaust Duration @ 0.050 in.: 237°
• Performance Class: Class V (highest performance level)
• Gear Attachment: 3-Bolt (Non-AFM / Non-VVT)
• Construction: Billet steel

Performance Characteristics:

• Optimized for turbocharged and supercharged LS builds
• Strong mid-range through top-end power delivery
• Aggressive idle quality — best paired with a high-stall torque converter or manual transmission
• Requires supporting modifications: upgraded valve springs, lifters, headers, and a tune
• Not compatible with Active Fuel Management (AFM) or Variable Valve Timing (VVT) systems without disabling those features

Melling's Class V camshafts represent the top tier of their LS performance lineup, purpose-built for maximum power output in heavily modified and forced-induction engine combinations. The 22503 is manufactured to exacting tolerances for reliable performance in demanding applications.