For the Kooks LT Headers, we make a catted midpipe that comes with the catback of your choice (and the J pipes are on there as well). It is a custom order, but we have the product on this forum here, so you can check it out: http://forum.grrrr8.net/showthread.php?t=15637

To order, call me direct at 516-655-9002. Thanks

Steve