Comp Cams "POW351506 Porting Mandrel (6"")"

This 'special' longer mandrel has been necessary for every porting job I've ever done; it's weird that it's never in the kit, always an extra purchase.Just like the shorter mandrel, it holds buffs or cartridge rolls, and it gets you into places you can't reach otherwise. I usually cut some of the pilot end off, so it doesn't stick out past the roll.

Easy to use

Used this for porting an aluminum intake manifold and it worked great. Held up to hours of use with no problems

Good price

Worked great for getting into small and deep areas to port heads

Nice piece but my electric die grinder spins to fast even with a speed controller. It bent this thing to 90 degrees at the collet after 20 minutes of use. It would probably be great with an air die grinder.

Don't spin this thing too fast because it bends really fast when you do that. I had to buy another one after I made that mistake. It works great otherwise

I use and abuse these mandrels porting and polishing intake and exhaust ports in heads and intake manifolds and this one has held up better than most havent broke the tip off my first one yet!