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- The X-Block 427 heart and soul is the new GM Performance LSX iron block. This X-block engine family utilizes RAW engineered camshaft that is custom ground. The 427 SCX foundation is a fully machined iron block with a forged Callies rotating assembly with Mahle pistons that is topped off with Magnuson 2300 TVS Supercharger.
- The RHS Block 427 heart and soul is the new RHS aluminum block. This RHS block engine family utilizes RAW engineered camshaft that is custom ground. The 427 RHS foundation is a fully machined aluminum block with a forged Callies rotating assembly with Mahle pistons that is topped off with Magnuson 2300 TVS Supercharger.
