What's the difference between MMS stage I and stage II heads?
02-10-2002, 10:29 PM
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Re: What's the difference between MMS stage I and stage II heads? The level of portwork. The "stage 1" heads have bowl work, mild intake and exhaust work, while the "stage 2" heads have full intake and exhaust work. Both use 2.02 1.57 valves.