I received this from NGK:
[IHello,
We do not suggest using anti-seize as we have a plating on the plugs that will act as a release agent upon removal. For torque we will need to see between 17-21 ft./lb. as this is a 14mm thread in an aluminum cylinder head.
Best Regards,
Jason Norwood
NGK Spark Plugs ( USA) Inc.
Technical and Training Specialist - Aftermarket Division
46929 Magellan Drive
Wixom, MI 48393
Office: (248)-926-7107
Fax: (248)-926-6938
Email: jnorwood@ngksparkplugs.com
ASE Certified
Ngksparkplugs.com
][/I]