| The blasted intake is a very good finish on the intake and should be fine on exhaust. The theory behind the polished exhaust is to reduce the surface area of the port as much as possible to limit heat retention and recirculation of heat back into the head. This is the reason for the insulated exhaust washer as well and the fine gap between the collar and header pipe. All designed to get the heat to the pipe and away from the head.
Any tool shop with dremel bits will have the cutters. Also the sanding rolls which go on the rubber drum as you say. You will need a pack of them. About $10. Before blasting make sure you take the iregularities out of the port. They are pretty bad.
Don't think you have to finish with the bead blasted port. I think its more asthetic than practical. Many top tuners leave the 60 grit finish.
Last edited by Mack : 13-01-2008 at 01:07 PM.
|