Since you asked so politely...
Sport 2 and Sprint 2 are completely different cars. Really nothing is transferrable between the two cars except for general hardware and maybe the shocks.
Sport 2 can be hopped-up all the way to Pro 2 spec. However the Pro 2 went out of production about 6 years ago. Parts are likely hard to find.
Best modification is to make sure the car is built right, all parts move freely, wheels point in the right direction etc.
Really there is no point upgrading your Sport 2. Just enjoy it, repair when it breaks (parts may be hard to find though), and save your hop-up budget for a new, current car when the time comes.