Originally Posted by
rc car freak
what engine is this? it is bigger than my .15 o.s. engine. it says cv-r on the other side and o.s. max on the picture side

it is on a tmaxx tho that is obvious. im just curious the tmaxx full of rpm upgrades was $45 no tranny. great parts truck for my brothers electric tmaxx
That is probably an OS .18 engine I dont which but you can get a hold of Hobbico tech support they could steering you in the right direction.