Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
I advise that you email or contact King rather then ask here. King make them so they know best, send them an email
Dear Sir/Madame, are you at all suggesting that the kind members of this reputable and informative forum are full of shizen-schnapps of a non professional manner when delivering detailed mechanical advice?
I'm suggesting that the guys that make/sell thousands of springs a year have a better idea then blokes who might fit 4 springs a year.
What does the HD indicate in the codes for each spring? Have seen it mentioned a few times.I installed ssl-hd in my ute and that was 2" below FE2,but might be different in a sedan.