When rebuilding an engine, it's imperative to have clean and straight threads to achieve proper torque. Powerhouse Products thread restorer tap sets are designed to clean and restore bolt holes in blocks, heads, components, etc., without undercutting. All sizes are stamped for ease of identification, as well as available in both N.C. and N.F. thread types. These Powerhouse Products thread restorer tap sets are packed in a plastic pouch and include the six most popular sizes needed.

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