Welcome to the addiction Swingnamiss...

I have the Hyper 8.5 pro kit as well and the same transmitter/receiver mate. I LOVE IT. When it comes to the throttle servo, IMO it doesn't really need a lot of torque strength there. I use a 12.0 kg torque strength servo and find that's more than enough. What does matter is servo speed. You want a servo that will go through it's full motion as quickly as possible. I use the JR DS8715. it's full motion response time is 0.09 seconds/60 degrees. I'm sure there are quicker and better ones out there, but it depends on what you can find at your LHS. If you're not racing, your engine and pipe are more than enough. Later when it comes time to upgrade, all you'll need to do is get a race engine and exhaust and practice, practice, practice....

I personally recommend the OS Speed 21VZ-B V-SPEC AL with either an OS 2060 SC pipe or JR3 pipe[>:]. Again, it depends on what your LHS carries. Convenience goes a long way in this endeavour.

Tires are chosen for track conditions as are shock springs, shock oils and DIFF oils.

Oh and remember....practice, practice, practice. 80% of winning is driving....[&:]. You could have the absolutely best set up costing upwards of 5K, but it doesn't count for much if your car is always upside down, eh?