I have a track day this Sunday. I was wondering what the opinion is regarding IC ducts. Right now it seems like my ducts don't really allow all of the fins to get full air. I'm thinking about either cutting the inner portion of the duct that meets the IC as well as shorten the depth of the duct itself, or potentially removing them altogether. I'm installing IC ducts and with these Z1 sized units, you don't really get the air flow unless the duct is gone or somehow modified. I also noticed the slit in my front bumper above the main opening isn't able to get air through since the plastic guard completely blocks it. I was thinking of trimming it and cutting a square out of the corner. You can see here, although dark, that the duct is really in the way for the air to make it through straight on back.
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