EXACTLY as Hank said above. On my 2T the pipe was like night and day..on my gf's 4T the pipe gave a slight increase only...but on the brighter side her engine ran much cooler...and it sounded awesome coming from a Lil Pink Scooter. Even the Harley guys at the local Biker hang out would give give her 2 thumbs up as she roared by...
