The difference is in the upper...they use the same lower. The Track Heat has 12" runner lengths whereas the Street has longer 15" runner lengths.
To tell the difference, locate the part number underneath the upper (again the lower is the same). The part number for the Track Heat upper will end with the number 2 and the Street will end with the number 1.
<font size=-1>[ This Message was edited by: 87stang on 1/26/07 1:05am ]</font>