Unique and Pretty Efficient Exhaust cutout

Kevin Jonker
A friend of mine, Kevin Jonker, has been working on this cutout design for a while and sent me the link to his new website. I think it is a pretty neat idea and wanted to share it (but sorry for posting the wrong address originally).

I must admit I have never tried one since my car runs smaller pipe but it might be pretty slick on some more powerful cars and trucks.
Tom