The Melling Class 4 Camshaft is a high-performance hydraulic roller cam designed specifically for GM Gen III and IV LS engines, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L applications. Featuring a 3-bolt, non-AFM, non-VVT configuration, this cam delivers aggressive performance with .625" lift on both intake and exhaust, and duration figures of 233°/244° at .050" lift. With a 112° lobe separation angle, it’s optimized for strong mid-to-high RPM power and a lopey, race-inspired idle. The camshaft is ideal for street/strip setups and off-road builds, requiring a high-stall torque converter or manual transmission and upgraded valvetrain components. Intended for serious enthusiasts, this cam is not emissions-legal and is best suited for competition use or performance-focused applications.

Features

Fits GM Gen III/IV LS engines (4.8L–6.2L)

Hydraulic roller camshaft, 3-bolt design

Non-AFM, non-VVT compatible

.625" intake / .625" exhaust valve lift

233°/244° duration @ .050"

112° lobe separation angle

Strong mid-to-high RPM powerband

Rough, lopey idle – performance sound

Requires high-stall converter or manual trans

Ideal for race, off-road, or street/strip builds

Not emissions legal – for competition use only