Haha there is little to no boost lag with the stock t25 because its so small. It like spools at idle lol
And upgraded smic is only good if you are staying around stock hp. Once you get higher up in the hp the fmic flows and is much better. And no, fmic does not make turbo lag. It will actually give you some more whp and run a lot cooler. Smic is a waste of money unless you plan on staying at the stock psi and numbers. And even then, the gains are not worth it and you cant have a mad tyte jdm intercooler up front in dah grillzzz
Thats why you see everybody upgrading to a fmic, and there are so many hard pipes for the smic for sale right now.
fmic > smic