COMP Cams Bolt 18X1.5MM Piston Stop - 4792

Heads-On Top Dead Center Piston Stop for Big Block Ford - 18mm Thread

Designed for heads-on applications, this piston stop features 18mm thread for use in Big Block Ford engines.

Positively stop piston in order to find Top Dead Center (TDC) Bolt style screws into spark plug hole while plate type bolts across any cylinder bore when heads are off.

• Bolt-style screws into spark plug hole while plate-type bolts across any cylinder bore when heads are off
• Now fits GM Gen III/IV LS engines
• Positively stop piston in order to find Top Dead Center (TDC)
• Now fits GM Gen III/IV LS engines