i just got a 3 inch catco off ebay for like 50 bucks and welded it in, and yeah it stopped the boost creep and i can hold any psi i want to all the way down to like 14 until redline with no creep, but yeah you'll feel a loss, just doesnt scream like it does with a test pipe on there, and i kinda miss the gaseous smell i got after exiting my car when i had the test pipe on
