RS6 Plus tuning

[Sonic2505]

So I wanna tune my RS6 plus... recommendations.

Satuning?
MRC?
MDM Technik?

Also do you need to declare to insurance company?


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[pcorpe]

I went MRC with my +, i had an 'economy tune' declared to insurance, made no difference to cost, still under £400

do you need to declare? your call.