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Old 07-10-2018, 07:08 PM   #1
Cab0oze
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Default SPT Exhaust Question

I picked up an SPT exhaust locally at a steal of a price so I bought it, despite already having a Nameless axleback with the 4" mufflers which I loooove.

I decided to install the SPT exhaust last weekend, and long story short, when I took it for a drive I was really disappointed how quiet it was. I haven't driven stock in a while, but it must be really close, I can't hear the exhaust hardly at all. This surprised me, because I had gone for a ride in a guys 2015 WRX a while back with the SPT exhaust (prior to buying the Nameless one) and I thought it sounded much more aggressive....

Anyway, the sound difference is probably all in my head, but it occurred to me that I forgot to swap out the stock donut gasket that goes where the midpipe meets the cat with the one that came with my used SPT exhaust. Does anyone know if the stock donut gasket is different than the one that comes with the SPT midpipe? I'm thinking that maybe the stock gaskets hole is a bit smaller, which would affect the sound. Can anyone confirm? I don't want to take it apart again if I don't have to, one of the bolts bent slightly during the removal (rusty), and I'm scared that if I take it apart again it'll snap lol

Oh, and I already searched. I saw some people saying you can re-use the stock donut, but while it "works" I'm curious to know if it is actually the same inner diameter.

**Edit**
Oh, and another question - looking at some people's pictures of the SPT exhaust on the 2015+ mine looks at least 1" more recessed... any idea why it might look different?
Picture from elsewhere on NASIOC:


Mine, which now that I look at this comparison it just looks even more horrible (I also just noticed it says "SPT" rather than "STi"... wonder if that has something to do with the difference?)





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Last edited by Cab0oze; 07-20-2018 at 06:45 PM.
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Old 07-10-2018, 09:08 PM   #2
Cab0oze
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Found my answer....

While it came off a 2015, turns out the exhaust is actually from a 2014!!
Piping looks like this (D441SFG350 2011-2014):


Instead of this (D441SVA100 2015+):


At least it was cheap lol.... Looking closely, I can see the newer model has shorter mufflers (hence why it is louder) and longer tips (hence why my tips are so far recessed)

But I guess the most surprising bit is that it actually mounted up perfectly?!? The hanger isn't as picture in the top picture, it looks exactly like the stock one. I'm so confused.

Here's what mine stock and SPT exhaust midpipes look like

Last edited by Cab0oze; 07-10-2018 at 09:16 PM.
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Old 07-16-2018, 12:06 PM   #3
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Thanks for sharing, this is actually very interesting. I wonder how many other aftermarket exhausts for the previous gen fit our FA's and how much they differ from the current aftermarket options in terms of power gains and such
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Old 07-16-2018, 04:02 PM   #4
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Quote:
Originally Posted by ED_WRX View Post
Thanks for sharing, this is actually very interesting. I wonder how many other aftermarket exhausts for the previous gen fit our FA's and how much they differ from the current aftermarket options in terms of power gains and such
It'd be on a case by case basis, but a lot of the previous-generation aftermarket catbacks will fit just fine on the VA chassis - assuming the older one was also from a sedan and not a hatchback. The downpipe/jpipe of course will not mate up at all since the motors are different.

It's not uncommon to see a lot of aftermarket companies put "2011 - 2018 WRX sedan" when talking about fitment for catback exhausts. More than likely the hanger locations are the same, but the way the tips sit may not match exactly as we saw with OP's exhaust.

As far as power gains with a catback, they are negligible at best.
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Old 07-17-2018, 12:16 AM   #5
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Quote:
Originally Posted by ED_WRX View Post
Thanks for sharing, this is actually very interesting. I wonder how many other aftermarket exhausts for the previous gen fit our FA's and how much they differ from the current aftermarket options in terms of power gains and such
Glad I could help, and hope this helps others in the future.

Like YungBoba said, with a catback not much point talking about power gains unless you're doing other power mods. Only difference is shorter tips and more muffler, so it's a tad quieter than the one truly meant for 2015+.

I bet any 2011-2014 sedan catbacks will fit fine on 2015+, and if it is one with longer tips (a lot of aftermarket exhausts do) it would probably even look perfect / flush. Might help save people some $$s...
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Old 07-17-2018, 08:39 AM   #6
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Just a thought if you're interested.... I have the SPT exhaust on my '17 and noticed it hung pretty low compared to the aftermarket ones that fit nicely up and in the cutout in the rear bumper.

I ended up buying 5 Grimmspeed exhaust hangers (pack of 4 and a single).

I replaced the mid-pipe hanger at the normal height and replaced the 4 on the mufflers sideways using the two holes closest to each other. Worked great, looks much better, and a super easy 'clean-up' mod to do.

Only advice would be to unbolt the mufflers from the mid-pipe for ease of movement when installing the hangers and using spray lithium grease on the new hangers to put them on.

https://i.imgur.com/NUdwV5g.jpg

https://i.imgur.com/zxQDcw8.jpg

https://i.imgur.com/9KP45Ta.jpg

https://i.imgur.com/GUaetAY.jpg
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Old 07-17-2018, 08:53 AM   #7
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Originally Posted by RIWRXer View Post
Just a thought if you're interested.... I have the SPT exhaust on my '17 and noticed it hung pretty low compared to the aftermarket ones that fit nicely up and in the cutout in the rear bumper.

I ended up buying 5 Grimmspeed exhaust hangers (pack of 4 and a single).
https://i.imgur.com/GUaetAY.jpg
Wow, that is a HUGE improvement, thanks for the tip. It blows my mind that Subaru puts products out there that should have a factory fit, but just look so sloppy and require modification to correct.

In my case though, that won't help - I think if I tuck it up underneath it will just end up being even more hidden lol
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Old 07-17-2018, 09:01 AM   #8
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I totally agree with you. Don't get me wrong, I'd say that overall I'm 95% a fan of the way they designed and built the car. The other 5% are little modifications to correct, in my eyes, the 'sloppiness'.

That's a bummer about your exhaust. In the near future I may be selling my exhaust. I'll let you know.
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Old 07-18-2018, 03:32 PM   #9
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I picked up a used catback from a 2012 STI sedan for $160. @RIWRXer - I'm going to look at getting those hangers. Simple and really cleans up the back.

https://i.imgur.com/nGOsyVH.jpg

Last edited by n7slc; 07-18-2018 at 03:40 PM.
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Old 07-18-2018, 04:04 PM   #10
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Quote:
Originally Posted by n7slc View Post
I picked up a used catback from a 2012 STI sedan for $160. @RIWRXer - I'm going to look at getting those hangers. Simple and really cleans up the back.

https://i.imgur.com/nGOsyVH.jpg


Good score on the exhaust.

If you have any questions, let me know.
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Old 07-18-2018, 07:19 PM   #11
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Quote:
Originally Posted by n7slc View Post
I picked up a used catback from a 2012 STI sedan for $160. @RIWRXer - I'm going to look at getting those hangers. Simple and really cleans up the back.

https://i.imgur.com/nGOsyVH.jpg
Where are the flanges? That looks like a 2015+ exhaust, not a 2012 exhaust (which would say "SPT")
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Old 07-19-2018, 08:36 AM   #12
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Yup, definitely looks like a 2015+ SPT exhaust.

Cab0oze, I was able to see the picture of your exhaust on the mobile app and holy crap that sits further back.
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Old 07-19-2018, 08:45 AM   #13
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Quote:
Originally Posted by RIWRXer View Post
Yup, definitely looks like a 2015+ SPT exhaust.

Cab0oze, I was able to see the picture of your exhaust on the mobile app and holy crap that sits further back.
Haha yeah I know

If it wasn't for that, I'd be perfectly happy with it.

It (surprisingly) still looks very good from a distance, but obviously when you get close you can't see the tips at all. I'll probably take it off and try to sell it (easier than trying to extend the tips like I saw some people do) <-- speaking of which, it's interesting that the exhaust is on the short side for the 2011-2014s as well lol
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Old 07-19-2018, 12:14 PM   #14
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Yeah, whoever realized that the difference between the hanger locations relative to the bumper on the GV vs the VA and designed those exhaust hangers must be some sort of handsome genius FYI the difference in midpipe hangers is fore and aft moreso than up and down so when I have been doing this mod I use the stock hanger and simply use a 4 pack.

Quote:
Originally Posted by RIWRXer View Post
Only advice would be to unbolt the mufflers from the mid-pipe for ease of movement when installing the hangers and using spray lithium grease on the new hangers to put them on.
Absolutely DO NOT use white lithium grease or anything petroleum based on urethane. There is a little warning card included in every pack of exhaust hangers that says to only use dish soap for this exact reason. The petroleum will cause them to break down over time, which can lead to a snapped hanger.

They're not expensive, nor a big deal to replace, but we do not want to see people a few years down the line with broken exhaust hangers wondering why!

Good looking out for one another though guys, it really was a strange oversight from the SPT team to change the tip lengths, but not the hanger lengths. BUT, even the factory exhaust hangs a bit too low.

Chase
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Old 07-20-2018, 11:30 AM   #15
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Quote:
Originally Posted by Cab0oze View Post
Where are the flanges? That looks like a 2015+ exhaust, not a 2012 exhaust (which would say "SPT")
Quote:
Originally Posted by RIWRXer View Post
Yup, definitely looks like a 2015+ SPT exhaust.
Well, damn. I guess I really did score at $160! The guy said it was from his 2012 so I took him at his word. However, looking at the flanges, it's definitely 2015+. No resonator either which fixed the drone from the stock exhaust.

https://i.imgur.com/bGVnAWx.jpg
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Old 07-27-2018, 12:21 PM   #16
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Any concerns with melting the bumper being tucked up closer to it like that?
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Old 07-27-2018, 10:21 PM   #17
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Default SPT Exhaust Question

Quote:
Originally Posted by ragman View Post
Any concerns with melting the bumper being tucked up closer to it like that?


Not at all. There’s still a small gap.
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Old 11-26-2018, 11:20 AM   #18
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I have a question on the SPT exhaust, I put a deposit on a '19 WRX that is scheduled to be delivered and was told it came with the STI performance exhaust system which I've learned is the SPT exhaust. I've done some reading up on it and I remember seeing comments about the turbo spool and can't remember which is correct. Does the SPT exhaust allow you to hear the turbo spool (whistle) better/louder than the stock exhaust ? Or was it the opposite ?

I used to have a '15 WRX (my first turbo car), and I loved that turbo whistle when I heard it. But sucked that I seemed to no longer hear it when I had someone in the passenger seat. So I'd love to be able to make it more audible. Thanks for any info
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Old 11-26-2018, 07:26 PM   #19
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Quote:
Originally Posted by LouRoc24 View Post
I have a question on the SPT exhaust, I put a deposit on a '19 WRX that is scheduled to be delivered and was told it came with the STI performance exhaust system which I've learned is the SPT exhaust. I've done some reading up on it and I remember seeing comments about the turbo spool and can't remember which is correct. Does the SPT exhaust allow you to hear the turbo spool (whistle) better/louder than the stock exhaust ? Or was it the opposite ?

I used to have a '15 WRX (my first turbo car), and I loved that turbo whistle when I heard it. But sucked that I seemed to no longer hear it when I had someone in the passenger seat. So I'd love to be able to make it more audible. Thanks for any info
The SPT exhaust will sound way better than stock, but I don't think you'll hear the turbo that much, just more throaty engine noise (and this applies to all exhausts). If you really want to hear turbo, you'll want to get an intake.
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Old 11-27-2018, 02:24 AM   #20
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Originally Posted by Cab0oze View Post
If you really want to hear turbo, you'll want to get an intake.
Is there any in particular you would moreso recommend for this purpose? That turbo whistle is addicting. I do plan to get an access port and tune
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Old 11-27-2018, 08:10 AM   #21
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Don't get an intake unless you want a plethora of tuning headaches and problems on an otherwise-stock car.

If you want to hear the turbo more often, crack a window open when you're driving and enjoy it.
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Old 11-27-2018, 09:03 AM   #22
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Don't get an intake unless you want a plethora of tuning headaches and problems on an otherwise-stock car.
Huh? I've had an otherwise stock car with a turbo and an intake for the last 10 years of my life (the last 3 being a 2015 WRX) and have never had any sort of issue, ever. And nobody I have known has had problems either...

Quote:
Originally Posted by LouRoc24 View Post
Is there any in particular you would moreso recommend for this purpose? That turbo whistle is addicting. I do plan to get an access port and tune
Just make sure that whatever you get has a OTS tune available on the AP. I have a Mishimoto intake (picked based on good reviews, a cold airbox, and I got it used at a steal of a price) and can tell you the turbo sounds are pretty loud, almost to the point of causing concern to unsuspecting passengers lol. Most of the intakes are the same design, so they should all sound pretty much identical.
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Old 11-27-2018, 08:59 PM   #23
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Originally Posted by Cab0oze View Post
Just make sure that whatever you get has a OTS tune available on the AP.
Thanks for the input.. To be sure how exactly would I know if it has an OTS tune available? This will be my first experience with Cobb

Mishimoto I've heard is thumbs up

Last edited by LouRoc24; 11-27-2018 at 09:45 PM.
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Old 11-27-2018, 09:18 PM   #24
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Does stock sti exhaust fit a wrx and viceversa? I suspect it does but would prefer someone confirm it.

Also, what size is say stock 15-18 sti catback, 2.5 or 3”?
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Old 11-27-2018, 11:43 PM   #25
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Quote:
Originally Posted by LouRoc24 View Post
Thanks for the input.. To be sure how exactly would I know if it has an OTS tune available? This will be my first experience with Cobb

Mishimoto I've heard is thumbs up
Huh, I really thought there were other options. It seems:
1) Cobb intak
2) Mishimoto intake - you get an old tune that does not get updated (that's what I have... not that there is any reason to update it)
3) Intake that doesn't require a tune - I wouldn't go this route if you can avoid it with options 1 or 2.
4) Another intake, and get a custom tune. This is probably the way to go if you're doing other mods anyway, but is also way more spendy

Ref: https://www.cobbtuning.com/maps

Note - it seems that Cobb is charging money ($25) for their Mishimoto maps now... bizarre. Glad I downloaded all of the 2015 maps when they were free.

Quote:
Originally Posted by Stija View Post
Does stock sti exhaust fit a wrx and viceversa? I suspect it does but would prefer someone confirm it.

Also, what size is say stock 15-18 sti catback, 2.5 or 3”?
I have been told that they are identical, only difference is the STi catback has a resonator. I just searched, and this backs it up: https://forums.nasioc.com/forums/sho....php?t=2716742
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