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there are 2 reputable Grom builders on the east coast. the one i went with, i was his 68th 2v 181NEO kit and he had 2 waiting after me. they both work with a dyno tuner in FL that only works on mini bikes that came from specific shops. i'd say it's pretty accurate that i'll be around 24hp. if you read up the 2v 181 NEO kits, you'll see that they get 21+ horsepower. the 4v 181 NEO's will get close to 30hp.