[builtnb]

Hi - I recently researched this myself.
6082 Springs, .750 wire diameter, 722 pounds, ($71.97 at summit)
6102 Springs, .810 wire diameter, 1015 pounds, ($73.00 at summit)
6454 springs, .820 wire diameter, 1060 pounds, ($73.00 at summit)
6452 springs, .780 wire diameter, 843 pounds, ( $63.00 at summit)
6104 pounds, .810 wire diameter, 1016 pounds, This is supposed to sit 1/2" higher than a 6102 ($79.00 at summit)

Found this by googling part numbers came up with O'Reilly's website and a post from Rob at NoLimit. Hope this helps.

Wayne