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Old 06-21-2017, 10:26 PM   #1
whalesalad
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Default Help me figure out the mods on my 2016 STI

My fiancee just got a 2016 Hyperblue STI. We purchased it used from a dealership here in Michigan. The car is originally from Texas.

When we bought it, we were handed a little folder with all kinds of receipts and goodies inside. One of which was from Cobb (in Plano?) which discussed installing a downpipe, catback, a turbo heat shield and some mentions of stage 2.

The heat shield is visible from the bay, and of course the catback is visible. I have no idea if the downpipe is still installed, but I am going to assume yes.

I noticed a smell of oil today so I opened the hood to check around... then I saw what appears to be a catch can with some of the most elaborate tubing I have ever seen on a car. Photo is below.
  • How can I determine if it is tuned or not? It will hit 20lbs of boost at WOT.
  • Can you help me identify the catch can?
  • Cruising at ~80mph the tach is at 3500rpm or so, is this normal? Does it have aftermarket gears or something? I'm not used to such a high engine speed at cruising in 6th.

Thanks!!!



And some other photos to make this thread legit:

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Old 06-21-2017, 10:36 PM   #2
whalesalad
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Oh and the exhaust is kinda drone-y too? From searching around, everyone claims the Cobb catback has zero drone... so I'm not sure what is going on there.
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Old 06-22-2017, 02:01 AM   #3
GlarryHoodDIT
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All of these questions can be answered by looking at the receipts from Cobb more than likely.

Yes the car is tuned, 3500rpm in 6th sounds about right at 80mph, I'm not sure if you understand how Transmissions work if you're asking about aftermarket gears...

Drone is relative in based on opinion, and you haven't said what brand (s) the exhaust is either. No one can tell you what the exhaust is on there from that description and those pictures.
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Old 06-22-2017, 03:53 AM   #4
Lezard Valeth
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As above said, car is tuned. Stock the car is limited to like 14.7 psi; you might spike to 17-18 stock, but consistent 20# WOT car is definitely tuned.

That would be an IAG street AOS, and unless the car is currently or will be running E85 in the future I'd get the "Competition" parts swapped onto it.
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Old 06-22-2017, 06:46 AM   #5
whalesalad
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Quote:
Originally Posted by GlarryHoodDIT View Post
Yes the car is tuned, 3500rpm in 6th sounds about right at 80mph, I'm not sure if you understand how Transmissions work if you're asking about aftermarket gears...
Glad to hear. I was referring to replacing certain gears in the trans and or the differentials to modify the final drive ratio. This is standard procedure in the RWD or 4x4 world, I am new to Subaru/AWD.

Quote:
Originally Posted by GlarryHoodDIT View Post
Drone is relative in based on opinion, and you haven't said what brand (s) the exhaust is either. No one can tell you what the exhaust is on there from that description and those pictures.
It's a Cobb catback. Everything is Cobb from the turbo back. I will dig through the folder again and find the photos to share.
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Old 06-22-2017, 06:47 AM   #6
whalesalad
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Quote:
Originally Posted by Lezard Valeth View Post
As above said, car is tuned. Stock the car is limited to like 14.7 psi; you might spike to 17-18 stock, but consistent 20# WOT car is definitely tuned.

That would be an IAG street AOS, and unless the car is currently or will be running E85 in the future I'd get the "Competition" parts swapped onto it.
Thank you!!! I'm going to do a lot of research on this. Ironic that the competition version is what I want, not the street version, haha. This car will be driven 95% of the time by my fiancee who is afraid to give it more than 20% throttle.
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Old 06-22-2017, 08:35 AM   #7
whalesalad
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Alright here is the receipt from Cobb Tuning in Plano, TX.

I totally missed the part at the top about the air oil separator.

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Old 06-22-2017, 08:51 AM   #8
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How do you buy a car and not know anything about it???
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Old 06-22-2017, 08:57 AM   #9
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Quote:
Originally Posted by wrxlaunch View Post
How do you buy a car and not know anything about it???
I mean, it's not that hard to understand. Sans the louder exhaust, without prior WRX/STI experience, OP and his fiance may have gone on a short test drive at the dealer and thought, wow...fun quick car. Just like they describe the STI as. It's in good shape, looks stock, so they do the deal.

Afterwards, they find receipts and start to notice the aftermarket parts.

While an enthusiast would have noticed some of these things when looking the car over, plenty of others (I'd venture to say even a majority of the newbs on here) wouldn't necessarily.
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Old 06-22-2017, 08:59 AM   #10
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Pretty standard mods.

Does it spike to 20lbs or does it hold 20lbs WOT?
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Old 06-22-2017, 09:04 AM   #11
whalesalad
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Quote:
Originally Posted by SoapBox View Post
I mean, it's not that hard to understand. Sans the louder exhaust, without prior WRX/STI experience, OP and his fiance may have gone on a short test drive at the dealer and thought, wow...fun quick car. Just like they describe the STI as. It's in good shape, looks stock, so they do the deal.

Afterwards, they find receipts and start to notice the aftermarket parts.

While an enthusiast would have noticed some of these things when looking the car over, plenty of others (I'd venture to say even a majority of the newbs on here) wouldn't necessarily.
Exactly.

I met her at the dealership to help negotiate the car, I didn't even go drive it with her. We had been looking for a Hyperblue for a while (almost got one last year but it sold out from under us). I trusted her, I didn't bother to test drive it. Reasons why I didn't anticipate it to be modified:
  • Being sold from a dealership
  • 2016MY car with relatively low miles
  • Stock wheels, no exterior or interior modifications, etc...
  • From the outside (and engine bay), the only indication I had that it was modified was the cobb exhaust tips – which I actually didn't even notice until mid-purchase process becuase they were pretty dirty and didn't look particularly outlandish.

Anyone can install a catback... which really does nothing to the car in terms of drivability and performance. I didn't even consider that it would have a downpipe and stage 2. I have no idea what an OEM STI sounds like, aside from the standard boxer grumble.

Also, there was/is no intake in the engine bay, and that IAG air oil separator is pretty stealth, and looks like an OEM part.


tl;dr – a catback did not set off any alarms in my mind, and I figured that ws the only mod.

But hey glad to hear NASIOC has the same kind of personalities as every other car forum
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Old 06-22-2017, 09:19 AM   #12
Lezard Valeth
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Car looks good though. I'd have no problem buying it with those mods since they were professionally installed and documented. Pretty standard upgrade that most STi people (myself included) perform or would eventually perform. I doubt your fiancÚ knows or cares what's going on there, but she can tell all the bros her car is stage 2 lol. It's nice for you though when you drive it; lil bit more balls when you give it the beans.

Do you have the Accessport for it anywhere by chance? I hope it wasn't flashed back to stock tune. You bought from a Subaru dealership? They make any mention of any kind of warranty?

Last edited by Lezard Valeth; 06-22-2017 at 09:25 AM.
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Old 06-22-2017, 11:58 AM   #13
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Yes. They love to break you down here.
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Old 06-22-2017, 01:09 PM   #14
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Looks like the previous owner modded the car with some caution since he paid $800 just to get the best AOS installed. With a Cobb downpipe and no CAI (cold air intake), I would assume the car is running the OTS (over the shelf) stage 2 tune from Cobb. Unless you have additional paperwork that shows that it was pro-tuned by a shop.

Did the car come with the accessport by any chance? If so, it is for sure running a tune since it would be stupid for the previous owner to keep the accessport and try to sell it being locked to that particular car.

If you're worried about running a tune for the long term, you can always source a stock downpipe locally, throw that on, and put the tune back to stock. The catback and AOS does not require a tune.
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Old 06-22-2017, 01:19 PM   #15
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If the car came from a dealer they are absolutely responsible for providing full information and support for everything on the car as it was sold to you.
Also FWIW it's a federal violation for a dealer to sell a vehicle that has had any emissions-related modifications as this one​ clearly has. The downpipe alone qualifies here as you can't legally replace it with anything other than an identical OEM one during the factory emissions warranty period. So technically you could demand they return the car to stock.
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Old 06-22-2017, 03:50 PM   #16
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Quote:
Originally Posted by whalesalad View Post
I'm not used to such a high engine speed at cruising in 6th.
3000 rpm's at 75 mph dead nuts
3500 would be 88 mph (time travel speed)
4000 rpm's is 100 mph dead nuts

yeah it's ridiculous that it is geared this way, no reason at all a car with this much power needs to be turning 3000 rpm's at highway cruise speed.

when I'm driving in traffic and can't accelerate fast I skip gears all the time
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Old 06-22-2017, 04:51 PM   #17
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Quote:
Originally Posted by whalesalad View Post
This car will be driven 95% of the time by my fiancee who is afraid to give it more than 20% throttle.


She would have saved money by buying an Impreza. I'm not trying to bust on you, as it does look like a nice, well modded car. But the above makes me go . Why the STi?
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Old 06-22-2017, 06:17 PM   #18
Lezard Valeth
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Quote:
Originally Posted by kilfarsnar View Post


She would have saved money by buying an Impreza. I'm not trying to bust on you, as it does look like a nice, well modded car. But the above makes me go . Why the STi?
People want what they want bro
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Old 06-22-2017, 07:06 PM   #19
whalesalad
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Quote:
Originally Posted by kilfarsnar View Post


She would have saved money by buying an Impreza. I'm not trying to bust on you, as it does look like a nice, well modded car. But the above makes me go . Why the STi?
I'm obviously being sarcastic. She has a lot of fun with the car!
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Old 06-22-2017, 07:44 PM   #20
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that's my dream subaru. i wish we got that color on the wrx here in the states like australia did.
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Old 06-23-2017, 01:41 PM   #21
kilfarsnar
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Quote:
Originally Posted by whalesalad View Post
I'm obviously being sarcastic. She has a lot of fun with the car!
Well, not too obviously!

I hope you both enjoy the car; looks like a good one.
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Old 06-26-2017, 05:43 PM   #22
NoFriendOfStang
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Default Catback

Looks like a nameless catback or muffler delete
https://i.ytimg.com/vi/5zcjcOg4joA/maxresdefault.jpg

Last edited by NoFriendOfStang; 06-26-2017 at 05:48 PM. Reason: Inserted wrong link to picture
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Old 06-26-2017, 07:05 PM   #23
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Well, you have no engine warranty. So there's that. If she's afraid of it at it's current power level put a stock downpipe on (easy and cheap with used parts) and unmarry the Acessport. You did get the AP with the car, didn't you? She'll get better mileage, and be less scared. RPM mentioned is pretty standard at that speed
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Old 06-26-2017, 07:06 PM   #24
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Quote:
Originally Posted by blackseafleet View Post
that's my dream subaru. i wish we got that color on the wrx here in the states like australia did.
We got them in Canada too. Sorry to rub it in.
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