I'll let you know. I have H&Rs on my 550 already and am likely having Dinan Shockwave done next week. Should allow me to have the best of both worlds. Be advised tho I am not sure Dinan shockwave will work o the 550i GT as isn't the car heavier and I know some of the F10 550i Dinan products do not work or are not applicable for the 550i GT. Better check with Dinan 1st would be my advice.
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'22 BMW M4 Comp (SSG/Black)
'16 BMW M4 (Shakir Orange/Black) - gone not forgotten
'15 BMW M3 (Black/Black) - gone not forgotten
'10 BMW X5M (Black/Black) - gone not forgotten
'08 BMW M3 (Space Gray/Black) - gone not forgotten
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