I dunno it had a spacer plate above the cylinder to clearance the pistons from hitting the stock head. And it ran damn good. Typically from what i gathered if it wasnt ported for a 4mil you would want to run a spacer plate in between the case and cylinder to correct the port timing correct? Wouldnt it run like shit without a spacer plate in between the case and cylinder if it wasnt ported? Ran great with +3 timing 310 mains 27.5 pilot toomey 2-1 filter, graydon proline pipes at sea level @ 70*....just trying to make sense of things, im not trying to sell anything i dont have. I listed it as 4mil top end cause of the pistons mostly...
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