Same as the 389-100 replacement insert for Calvan 38900 kit.
• Patented lip makes sure there is no loss of compression
• Permanent fix to damaged Cylinder threads
• Replacement insert for the MTN9200 repair kit
• Replacement spark plug insert for Ford engines
• Used to repair damaged cylinder heads with blown spark plugs

Replacement insert for the Ford Cylinder Repair Kit (MTN9200). This listing is for 1 insert. Steel alloy steel insert, with black oxide rust preventative treatment.