that novarossi is no joke, i have heard from other pro modd guys that the os falls a little short on top compared to the Novarossi. But i have also heard that grinder has said for a huge track, the SIRIO is king on the the long straits. josh cyral rab for team magic and had a sirio in his G4 and won some big race with it, they said he was pulling 5 to 6 car lenght on every one in thet race. ya so any way just my two cents. if you are looking for a good mod guy with good support and outstanding work look at the murnan modifieds thread, he is awsome. his thread name is Grinder. 12+3ct great choice. hop that helps.