i have used JKM for my Revo remap and they were very good but not tried their rolling road.
The one i used before on my old S3 was at Regal Autosport in Southampton as we had a Rolling road day organised on another forum so i went along as it 15 mins from my house. Never been to one before so cant compare accuracy or anything but it is a proper 4WD one and my old 210bhp S3 APY with a custom code Stg1 map got about 245bhp on them so cant be too far off.
i have also used them to get a few bits done to my car as they used to have a very tuned up 8L S3 so new a fair bit about the cars etc.
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