Prima High Performance Exhaust for 50cc 2-Stroke Buddy, Rough House Scooters Get a mean tuned pipe to boost your 50cc bike’s performance, looks, and SOUNDS! This Prima brand pipe was engineered specifically for the 50 scooters, and was tuned for max horsepower at 8500rpm. It works great with a cylinder kit or alone! Be advised, this will void your warranty! You will want to check your jetting and possibly change your variator weights too. Comes with mounting instructions. **NOTE: Not legal for use in California on pollution controlled vehicles. Check local laws before installing.** **