Went to iND last week and had AMS catless downpipes installed. Hands down the best mod for M5. I had e-race and gruppe m intake and never really felt power difference but with these down pipes there is no mistaking a significant gain in power. Also turbo lag is eliminated. That slight hesitation you get in 1st gear is gone and 2nd and 3rd gear pulls are insane.
Cold start is loud but hopefully we can eliminate that with a ess tune soon. Driving around town you will turn alot of heads. It's sounds amazing and I never want to stop driving. Best mod I ever did even though my neighbors disagree strongly haha
thanks to Nate and everyone at iND for hooking me up.