You don't really need to do anything to a Sprint 2 to bust it slideways...
as long as you have a nice smooth area to drift on and have suitable tyres

If you want to increase the Speed and power, then upgrade to a Non AI 15T ESC like a Novak XRS or M-Troniks RV15 ESC and go with a Team Orion 19Tx2 Method R..

The Method R is an Adjustable 19x2T motor and has enough RPM for nice Broad Slides and enough Torque for technical.. wack on a set of Radials and it will make a good Street racer..

Other Motors you could try
Tamiya RZ
Trinity Komodo 19T
Any 27T Tagged Motor like a Team Orion Core or Trinity Co27