Unlike the competition, we don't offer stages to our heads: we simply offer the best product possible. Our 6.4 Apache HEMI heads come standard with the following: •Proprietary CNC porting of intake and exhaust ports •Hand blending of bowls •Multi-angle valve job •New factory hollow valves Re-profiled to MM specifications •New SRT-8 springs •New seals, shims and retainers •Cleaned, Deburred and assembled If you are unsure about the available options, please call the us so we can help you choose the most appropriate components for your application. *There is a refundable core charge for this product. If you wish to send us your cores for machining please call 276-666-1934 to place your order