GM Gen V (Gen 5) LT 238/258 Positive-Displacement Blower Camshaft – .625"/.637" Lift – 122° LSA

Designed specifically for positive-displacement (PD) supercharged LT combinations, this 238/258 camshaft is built to take advantage of the unique characteristics of Roots-style and TVS-style superchargers.

Featuring 238° intake / 258° exhaust duration at .050", .625" intake lift, .637" exhaust lift, and a 122° lobe separation angle, this profile is designed to provide excellent cylinder filling, strong airflow, and a broad powerband while working with the increased cylinder pressure and airflow of a positive-displacement blower.

The wide 122° LSA helps control overlap and maintain a strong, efficient power curve under boost, making this cam an excellent choice for high-output PD-supercharged LT engines where maintaining boost, airflow, and drivability are critical.

Ideal Applications

• Positive-Displacement Superchargers
• Roots-Style Blowers
• TVS Superchargers
• High-Output Street/Strip Builds
• Naturally Aspirated Performance Combinations
• Other Boosted Gen V LT Applications

Gen V LT Applications

Designed for compatible GM Gen V LT combinations, including:

• LT1
• LT2
• LT4
• LT5
• LT6
• LT7

Camshaft Specifications

• Platform: GM Gen V LT
• Intake Duration @ .050": 238°
• Exhaust Duration @ .050": 258°
• Intake Lift: .625"
• Exhaust Lift: .637"
• Lobe Separation Angle: 122°
• Primary Application: Positive-Displacement Supercharged
• Additional Applications: NA • Boosted • Race

Recommended RPM & Converter

• Recommended Operating Range: 2,500–7,000 RPM
• Strongest Powerband: Approximately 3,500–6,800 RPM
• Recommended Converter Stall: 3,500–4,000 RPM
• Race Applications: 4,000–4,500 RPM stall may be beneficial depending on the combination

The ideal converter and operating range will vary based on engine displacement, blower type, boost level, compression ratio, rocker ratio, gearing, vehicle weight, transmission, and overall combination.

Built for Boost

The 238/258 duration, .625"/.637" lift, and wide 122° LSA combination is engineered for serious Gen V LT performance, with particular emphasis on positive-displacement blower applications.

Pair this camshaft with a properly matched valve spring and retainer package for a complete performance valvetrain capable of supporting increased RPM and boost.

Professional installation and complete valvetrain clearance checks are required. Verify piston-to-valve clearance, spring installed height, coil bind, retainer-to-seal clearance, and overall valvetrain compatibility for your specific engine combination before operation.