I just got an email from a Strutmasters customer service rep confirming that their four-corner kit DOES NOT work with a 4.8is. No explanation as to why. I still can't understand why that would be the case. Is there something particular to the 4.8is frame or the rest of the factory suspension components (i.e. mounting points?) that would prevent a kit for a non-sport E53 from working?

I also had an interesting and very uninformative phone conversation with a Suncore customer service rep. They would not confirm (or deny) that their four-corner kit works with a 4.8is, but did point out that it doesn't say it WON'T work on their website (yes, I see that, thank you very much). She also said that the only people who know what brand of springs and shocks they use is their purchasing department. Apparently they are very protective of that information. So, they won't commit to me that their kit will definitely work with a 4.8is, or tell me what it is exactly that I'm buying, but I should just go ahead and spend $1,699 on their product. Ummmm...ok. Probably not. Thanks anyway, guys.

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