Okay, when 40k more I have to change to new shock, I will try KON. But I didn’t see one for the F15.KONI Red proved really good in that comfort/performance balance. Bilstein B6/8 (8is version for lowered vehicles) have similar function as KONI Red, but emphasis is on performance. KONI is going for balance. I personally on X5 would try KONI Red. They are both superb quality. Bilstein proved though better on track environment taking beating.
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let’s me know if you see one.