i along with over 15 of my customers who've bought turbo xs fmic's and buschur untis have never complained or noticed increase on lag with the addition of intercoolers on the stock turbo. I def noticed a positive difference in power though when i installed mine

 

neither go with the horsepowerfreaks kit, direct bolt on and the largest one that retains stock bumper beam, can't beat that...

 

ams!!!

 

All of our intercoolers are on sale right now for Christmas