[HWYSTR455]

Butler uses the bare 72cc heads when using their' CNC porting programs, they can do it IF the casting is a certain generation. Believe the first generation ones don't have enough meat for some of their' programs.

Call them and ask. They will accept customer's heads and CNC them. If you are unsure of the generation, they can make the determination at initial inspection.

There were some casting issues in the early runs of the first generation as well.

Recommendation: It costs the same to run just a chamber program as it does the base 315cfm program, so might as well do that.

They can do a 'modern' chamber too, but again, believe it's relevant to the generation.



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