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8241 Battle Cars is a TECHNIC Speed Slammers set released in 2001. It can be played as a game by two players. It includes two cars: one green and one red, that have swinging arms controlled by a knob on the back. The way the game is played is; The players maneuver their cars and use the swinging arms to try and hit a target on the opponent's car's front. If the target is hit, the car's engine flies off. It has 115 pieces.