Resurfacing an OEM 2006 WRX flywheel - Transmission (AT/MT) & Driveline - NASIOC
Found this too.
This is confusing.
I should mention that this will be the third clutch on this flywheel without a resurface or replacement. I took the stocker off at 10,000 miles just becasue I knew it would not hold the added power. I did not resurface then. Then I went through this 6-puck pretty quick, in 8,000 miles. The wheel is smooth and un-cracked or scored, it is just very blued & smuged.