.........SYMS headers, are these equal or unequal?-
http://i159.photobucket.com/albums/t...y/100_0639.jpg
http://i159.photobucket.com/albums/t...y/100_0640.jpg
http://i159.photobucket.com/albums/t...y/100_0641.jpg

.....currently for sale but need to clear this up.

 

Clearly unequal. If it helps, equal/unequal refers to whether the pipe length from the up-pipe to each of the manifold-head flanges is the same. Also, equal-length headers usually have a big loop of pipe going from the right-side flange to around the center of the cross-over pipe.

 

Just get a tape measure out and measure the length of each runner. From the cylinder head flange to the collector where all four join together. Equal length headers, strangely enough, are all around the same runner length. (perhaps not exactly)
Many header sets sold as equal length are not equal length.
It is the unequal length that gives the Scooby burble. True equal length sound like a Jap four cylinder motorbike, like a GSX R-1100 etc.