I have an inexpensive silicone TIP in the Audi TT and when I go under full throttle i feel a "chocking" and hesitation at mid to higher rpms. I am running 22lb of boost so it makes me think that its not getting enough air or the TIP is collapsing under full boost.
I have ordered a new foam air filter and considering taking the TIP and MAF out to see if i run into the same problem.
any thoughts or pointers?