- Range: 2.1/2" to 4" (65 to 100mm).
- Body Diameter: 3/4" (19mm).
- Length: 3.1/4" (82mm).
For re-installing the manifold on small block engines
A simple way to expand a warped manifold so all bolt holes are accurately aligned. Helps prevent cross-threading of manifold bolts. Works best when used in pairs. Install before removing manifold to prevent mis-alignment.
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