Features & Benefits
- Repairs 14mm tapered seat and gasketed spark plug ports in aluminum and cast iron heads
- No drilling required
- Includes: tap, expanding tool & one each of 3 sizes of inserts.
- 98142 – 1/4” Insert
- 98143 – 3/8” Insert
- 98144 – 5/8” Insert
- Pro-Thread Kit MTC 14 – 1.25












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