Originally Posted by coops09gxp
Thanks for responding Aaron! I may have worded that a little poorly. I wasn't trying to imply that a special plug is required, just what would be the equivilent to the TR6. The TR6 is a tapered seat with .708 inch reach. I had some TR55 plugs sitting there and tried them just to see about the reach and it left them up in the threads a good way still. The plugs I ended up getting are NGK ZFR6F-11. These are a gasket style plug with 14mm threads, .750 reach, 6 heat range, v-groove design, and the specified gap for these plugs is .044. Sorry about the confusion Aaron!!
No problem! We have used both styles for years with no problems. Just wanted to make sure we got you taken care of. Let us know how she performs after you get her tuned!