well, that doesn't mean u cant use it for street, i think it just means its enhancing power which u dont need on the streets? and as it claims on the site its "great for turbo cars". or something like that.. i mean sure its a pretty cool thing to have, i mean play around with ur exhaust loudness lol.. its like a toy =D. but yeah for 200 bucks more.. id go with a normal xforce muffler =D.

