JP Novarossi TX15
 

I bought this engine before I knew about the RTU's, J-Tech, and other modified engines. Well I though JP modified engines were good, but a lot of people say other wise. I have the JP Novarossi TX15 and was wondering if any companies will modify an existing engine u have if u send it in. Also are there any easy mods to make the engine better. I just like to go fast and maybe enter some casual races in my area.

try the Smeltz modified engines thread, it's inside the Nitro -on road thread and he might mod it for you