Hello, for a portion of time I was attempting to find cheap power adders to my 2016 BMW 650XI GC and I saw a tune that popped out to me the most from DME Tuning, I found them from Instagram posts.
There Stage 2 Tune claims to add +151 HP and +160 FT/LBS TQ with just upgraded downpipes.
Is this legit? Should I spend the $2500+ or will I be scammed?
Below is a screenshot of their claims
and
here is a link.