Originally posted by racinZrooky
I need to port my HPI header but am not sure exactly which bit to use. Also do I have to also polish it out after the grinding?
just use any metal bit that has a teardrop shape. use this to get the main parts of then use a small stone bit to smooth out then a wire circular brush to smooth.
wash all the metal files out with water and then buff it with metal polish if you have the time/patience/and the right dremel buffer bit.