Pro Class 408 RS

6.0L LQ4 Engine | Ideal for 1200 HP builds

Built for power and performance, this 6.0L LQ4 engine is bored and diamond-honed to 408 ci, featuring a forged CALLIES Apex crank, Compstar rods, and high-strength ARP hardware. With forged pistons, custom LS3-style heads, Manley extreme duty valves, and precision port work, it delivers maximum airflow and strength. Upgraded with a high volume Melling oil pump and ready for turbo or supercharger setups up to 1,200 HP, this engine requires custom tuning for peak performance. Backed by a 6 months warranty