09-02-2014, 07:27 AM
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#532 (permalink)
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A True Z Fanatic
Join Date: Aug 2011
Location: Houston (Pearland)
Age: 44
Posts: 1,205
Drives: 2011 370Z M6
Rep Power: 17
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Outer diameter. You can use a 70mm but it requires a bit of cutting, I prefer 60mm with a diffuser.
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