Head Surfacing Websites:
ruffstuff.com
Cylinder Head Abrasives
Porting supplies for the high performance racing industry: abrasives, cartridge rolls, carbide burrs, finishing and polishing products, and valve seat tools.
davemackie.com
Dave Mackie Engineering - Custom Heads, Pistons and Cams for Harley-Davidsons
Makers of High-Performance Heads, Pistons, Cylinders, and Cams for Harley-Davidsons.