Normal
For the lower exhaust,I had to have a shim that was either 1.71 to be .25 or 1.72 to b .24,not really experience with "sanding..and I didnt want to go 1.70 shim because then I would of been out of specs at .26,so i went with shim 1.75 that gave me .21.I can somewat fit .22 in there but gotta force it in more
