Pipes: That's a mystery up till now....apparently it works best with Team Orion's own pipes, but the dyno tests were made with Novarossi's 2601 pipe and the engine made it's top HP readings. So far from factory testing you are better off using headers/pipes that favor low end torque, the engine will take care of the top end speed.

Plugs: Fabrice Ramella, the designer of the engine tried everything for 2 years. Many plugs can work but he was not satisfied with the life of them, so he decided to create the CRF plugs which are just supposed to have longer life and excellent ignition. For 25% and higher I would use either the #6 or #7. If you are running 16% you might want to run the #5 or #6. The #7 with 16% can be a bit too cold of a plug - I would only use this in 90F+ weather.

Of course Team Orion recommends their plugs but others will work. It is a good practice though to use the head button with Orion plugs, if you use a different plug then continue to use that plug with that button. If you want to switch back to a different plug or the Orion ones, use a new combustion chamber - The Orion plug is slightly different but when you tighten in another plug it works fine. It's just not a good practice to jump from one to another for tuning purpose and fatigue on the aluminum of the combustion chamber. They suggest the Orion plugs because they will produce slightly more power.

AFM