If you are changing the header tighten the bolts snug and run till hot, let cool a few hours and tighten again. Might take 3 or 4 times but you'll never have an exhaust leak at where the header mates to the jugs.

 

Never heard of needing to do that. Thanks for the tip......

 

All plugs come with Fuel Moto head pipes.

 

After going ahead and speaking with Fuel Motos, I decided to reconnect the 02 sensors into the new V&H pipes, then I disconnected the two 02 sensor clips under the side panel on the bike. Much less work, and no need to spend money of a pair of plugs.