These COMP Cams tools are designed to stop the piston in order to find top dead center. They mount on to the top of the engine block and thread into the existing head bolt holes.

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COMP Cams Piston Stop, Top Dead Center Stop, Cylinder Heads On, Spark Plug Style, 14mm, Adjustable Depth, Kit

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Powerhouse Top Dead Center Stop, 18mm Thread, Each

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Proform , Chevy Top Dead Center Locator , Screws Into the Spark Plug Hole

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Powerhouse Top Dead Center Stop, 14mm Thread, Each

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COMP Cams Dial Indicator Stand, Aluminum, Blue Anodized, Magnetic Deck Bridge, 4 1/2 in. Bore Span, Each

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COMP Cams Piston Stop, Top Dead Center Stop, Cylinder Heads On, 18mm Bolt Style, Kit

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