It's a 2.75 inch internal diameter, tapering to two inches for the stock turbo. Best of the CAIs out there, IMHO, and gives the car an instant butt-dyno improvement. It's relatively quiet. You won't hear the turbo, but you will hear some recirc noise. How many HP you actually pick up is highly dependent on several factors, but with this and my Lex tune, I was somewhere between 240 and 250 WHP at 6600 feet (per Virtual Dyno, your results may vary, void where prohibited). Probably 260-ish at sea level, so a pretty good bump from stock.
What you get with this purchase:
1. Mazdaspeed CAI for 2006/7 Mazdaspeed 6. Not made for MS3.
2. Dry flow filter, freshly cleaned. Rubber isn't in the best shape, but it works. If I were keeping this, I'd buy an AEM to replace it, but it's probably got another year in it, roughly.
3. Air straightener. I never used it, but the previous owner did.
4. Injen metal splash guard.
5. Outdoorwears pre-filter, also freshly cleaned
6. Instructions that came with the intake.
7. Pre-filter cleaner.
8. Mounting bracket thingy dingy
Closeup of the filter:
Thingy Dingy:
I can either ship all this or we can meet up for local delivery.
Asking price for all this sexiness: $100 shipped to the continental United States. If you're local, I can obviously deduct shipping costs as needed, and possibly help you install it too, if needed.
These go for $350 new.
Sorry for the MSF signage. Didn't think it efficient to make two photos of everything.