I'd get decent 2nd user wheels/tyres-16 inch looks right others too....ooo big! 18" are gros!!! renew all 'stock' parts that are worn, esp. suspension, brakes and "anything" rubber. change all your lubricants for redline with Xtralube ZX1 additives-it works!!! Stick to stock diff ratio to preserve RPM @ 'cruis....ing' speeds, economy, & wear 'n' tear etc. The 'stock' car is quite lively anyway! Hell-do you want to race? NOTE: normally aspirated engines that aren't designed for turbos can 'quit' sooner because of the extra strain etc. likewise nitro inj! (swings and roundabouts-always a price to pay-give and take!) 'Safer' upgrades: pipercross air induction, freeflow exhaust, FSE PBV, stronger spark with oil coil, inductive ignition w/IGBT, NOTE: multi sparks are nonsense-no such thing above 3000RPM! Electric cooling fan, mild cam work 'for road' w/porting. I use PI lowering springs (40mm) w/boge turbo GAS shocks for better handling while at the same time it's not too...ooo HARD! on the ride 'quality'! I use Pagid race pads with original discs and gives quality stopping power!