Well seeing as how its one of two things that actually helps with boost control (eliminating boost spikes)....then I'd just tell Cam I want it anyways. Totality necessary? No. Will it help your car? Yes, with a tune it will. If you can not get a tune; don't even install it as it will royally mess up your boost tables and WGDCs.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae
Thanks I'll look into that other tuner..man just drove two hours one way to meet a kid that was selling a Cobb tuner get there plug it in to make sure it wasn't married anymore and it still was to his car that he sold..what a waist of my time. Atleast I gotta race an sti on the way there got beat but o well..his car sounded funny sounded like the turbo fins were like almost scraping or something..