That is not your exhaust number. You will get that later in the invoice.

I have the non-res - and my buddies 18" res with ART pipes is as loud as mine.

You def don't want HFC's (or ART pipes) with non-reso if you are concerned about noise.

#1552 shipped!!! Now the four week wait to get here in Australia

Anyone know what number we are at?

I'm #1568 and haven't heard anything yet. I enter my estimated ship date range beginning tomorrow (2/15 - 3/1), however judging by other comments I'm guessing mine will be shipped towards the end of the range.

We are shipping up to # 1564 at the end of this week.

Thank you all very much for your business and patience. :tiphat:

- Kevin

Thanks for update!!

Hey is anyone here using an FI 2.5" CBE with an AAM TT kit? Want to know if it bolts up easily with the 3" down pipes and doesn't sacrifice too much power.

I don't want to order the 3" FI CBE if I don't need too.

Cheers.

Well AAM got back to me on this, apparantly I will lose a good 20-25hp and 200-300RPM slower spool up time with a 2.5"vs 3" on their TT kit.

Hell Yeah!!! so im #1566. Shipping this coming week!

shadow85,

As you know we offer a 2.5" CBE and 3" CBE. Working with our TT system, we see a 10hp difference at 600 wheel between the 2.5" and 3". That said, the Borg Warner EFR turbos that are in the AAM TT system are much larger than our Stage 1 & Stage 2 turbos, so I recommend that you run our 3" exhaust in-conjunction with their TT system.

Please do not hesitate to give us a call if you have any questions.

Thanks.
-Tony

Such professionalism

I've had the 18" res cat back for some time now and love it, and today my HFC are going on! Yay! Finally got a spot at my local speed shop. I'll report on the increase in sound to those that have been asking about it. I did get the res HFC btw.

Looking forward to this. I have the 18" res with stock cats and absolutely love the sound. I'm interested in the power increase with upgraded cats and a tune but the exhaust sounds pretty much perfect now and I don't want to ruin that for an extra 10hp or so.

All done and I'm happy with it!

For me, the car was already naturally loud. I recorded sessions over a 30 min ride to work through the Austin TX hill country where you have to downshift to get up some of the hills without lugging the engine and recorded the results. I also recorded results during spirited driving. My hopes was this might help me rationalize what I hear and think to real numbers.

My initial thought was, yes it's louder but not much. Drone wasn't much worse at all. Not deafening or annoyingly loud by any stretch. The exhaust had a clearer "note". Having something to compare to now, I would describe the previous sound as somewhat "held back" or slightly muted. I could hear more of the "thump" of the cylinders might be another way to describe it.

Enough about my opinion though... lol. Here are some numbers from my iPhone app.

With 18" res and stock cats: 85 avg db, max 94.
With 18" res and stock cats during spirited driving: 85 avg, max 97.
With 18" res and FI HFC: 90 avg, 98 max.
With 18" res and FI HFC during spirited driving: 90 avg, 101 max.

No tune yet but I'll post my results when I get them in case someone is interested.

If you think the sound is perfect with stock cats, you might not like the extra volume or tone you get with the HFC. I wish I had a video or sound recording so you could hear the difference in just the tone... :(