APE Positive Stop TDC Tools

The only accurate way to find top dead center. CNC machined billet aluminum.y accurate way to find top dead center. CNC machined billet aluminium.

TDC10 10mm TDC Tool

TDC12 12mm TDC Tool

TDC14 14mm TDC Tool

Note: NGK plugs starting with "C" are 10mm.
Starting with "D" are 12mm
If you use another brand, you will have to remove the plug and measure it .