I've read some are using the GRP/ninja plug in novaroosi engine. I've look at these two plugs and they very different. The Grp plug does not sit flush in the burn chamber like the nova plug does. I also read the Ninja engine could not use Nova plugs. Then why would a GRP/Ninja plug work in a novaroassi engine. To me the GRP/Ninja Plug is not a suitable replacement for a Novarossi plug.

The GRP plug is a bit shorter as the Nova plug. So the GRP/Ninja burn chamber is too short to use a Nova plug, it will protrude the burn room.
It doesn't matter that the GRP plug is a bit too short for the Nova burn room.
The only thing it does is creating a bit more volume, so a somewhat higher top speed (2-3 Km/h).
It does create a good seal and that is the thing that really counts.

The GRP plug is far superior to the current Nova ones. With the Nova ones it is always a bit of a gamble if it will last a main final or destroys your engine halfway.
The GRP plug is also available under the Max brand, so you could go for that one as well if you still not trust it.

thats not true my fellow, I use grp plugs on my 2 max power and works great! and also I have tryed nova plugs on my ninja mr and also wor fine but not as good as the grp. You should try! you won't regret! use grp on nova engines is a tip we got from Mike Swauger here in PR.
we on PR called them the transformation plug! Lol

There is a reason why the new MaxPower plugs are NOT Nova, but the old GRP's.

Thanks for the clarification gentlemen.


Pass you soon...