I have recently put dual K&N's on my car such as Damian and his custom heat shield setup. My car now will rev up fine in neutral but in drive will shudder when the primary turbo comes on at 3k rpm. I asked Damian what it could be. He told me to check the boost sensor , but it seems to be in good working order. Any help will be appreciated.

 

Seems The intake is not the problem , I put car back to stock and it still does it. I think ill just take it to a mechanic

 

I'm actualy having the same problem and is not the intake, I'm gonna borow my friends boost sensor from his FD tomorow and see if that makes any difference.

 

Good luck