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My buddy has done it on his 17 250sx. You'll need subframe, airbox, gas tank, seat and all associated plastics. He got it to fit with his 17 radiators, just had to warm the shrouds a bit with a heat gun to get them to flex into place. Be prepared to spend a few bucks. Silencer mounting points were not the same with the updated subframe on the 2 strokes. Only one of the two silencer mounts for the long pc silencer are able to mount up. Not sure how the 4 stroke mounts will do for you, but anything...