Which down pipe are you looking at?  They have a two piece, that would work but I don't like having to clamp it right there at the top of the motor, if that is the case.  That one is $185.  Their other is $450 and looks like the Terry Houston style down pipe, which is very popular and a very nice piece.  
That 44 and a good down pipe will make a noticeable difference in your car!