correct springs??

Location
kansas
Question for you knowlegable ones. I thought I read on this site that the H&R springs are same part # 53043 for FX35 & FX45, but I went to the H&R web site & noticed that they list a part # 53045 for the FX45. I just received the springs with part # 53043. Do I need to get the #53045 for my FX45?? When I ordered them from Tire Rack I did not see this part #, but noticed that they listed the same Ebach spring for the FX35 & 45, so I assumed that the H&R was the same. (you know what you get when you assume)
Thanks
 
An update,
Thanks to Chedman13 for his inputs, based on his pictures of part #53045 spring package, & my H&R springs package (part #53043), the 53043 & 53045 part #'s have the same springs in the box, based on the markings on the springs themselves.
 
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