Ask your self a few questions are you a good mechanic. do you have Patience and skills to deal with fuel systems and Boost. These aftermarket bolt on Turbos are usually a pain in the Ass, I have been down the road of Turbos and with a Non Factory Turbo you will be dealing with a secondary fuel system and plumbing of fuel system and turbo tubes and Intercoolers. There is a lot of stuff going on and a lot can go wrong fast and cause you many a weekend sitting in the Garage dicking with Gremlins. Secondary fuel system Tuning can be a nightmare and if it fails while running under Boost guess what ???? Booom motor goes Bye Bye. Best case scenario is you burn ring lands but in most Polaris xp cars they detonate and break rods.
Think about it before you jump in.
Good Luck.