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This modification is a great enhancer to all of your performance up grades and will give you an additional boost.
I mill the surface and re-cut the squish band. This gives the 200"s more bottom end torque and a snappier rev.
The 220's get a big benefit too, as they are low in the compression department. This will give a better pull through the mid-range and helps with top-end power.
All of these mods are designed so you can still use premium pump gas. On request, I can give you even more compression for the serious engine builder. This will give more power and you will need to use race fuel.