Need 4 1/2" hole in Aluminum ??

[regal2800]

Yes for a one time deal hole saw will work. Who makes the fighting chair? Update with a pic after install.

[HFD1 Motorsports]

second the drill a piece of ply the size to stand on. Just did this for a spacer for a sprocket. I used .080 thick sheet alu and messed up 2 before using the ply trick.the pilot hole wonders and you get a screwy cut....my 2 cents