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Old 09-13-2015, 09:45 AM   #3376
SpikeTi
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What would be a better option as far as performance & emissions:

Killer B j-pipe by itself and a q300 catback, or the catted ETS J/downpipe and axleback?

Originally thought I'd just want a catback so I wouldnt have to deal with emissions & inspections, but Im starting to consider more performance (mod bug). Kinda feel like I'd be giving up some gains over the other set up, however slight they might be. The Killer B & Invidia set up would be cheaper, but I feel like the ETS set up would sound & perform better.
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Old 09-13-2015, 10:13 AM   #3377
blk05wrx
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Quote:
Originally Posted by SpikeTi View Post
What would be a better option as far as performance & emissions:

Killer B j-pipe by itself and a q300 catback, or the catted ETS J/downpipe and axleback?

Originally thought I'd just want a catback so I wouldnt have to deal with emissions & inspections, but Im starting to consider more performance (mod bug). Kinda feel like I'd be giving up some gains over the other set up, however slight they might be. The Killer B & Invidia set up would be cheaper, but I feel like the ETS set up would sound & perform better.

For emissions, you want the cat as close to the engine/turbo as possible. That way it comes up to operating temperature and starts burning off the bad stuff as early as possible. So you may want to look at the Cobb J-Pipe.

It still won't pass a visual or sniff test, but if you have it tuned with no check engine lights, you'll pass an OBD scan inspection.
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Old 09-13-2015, 10:38 AM   #3378
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Originally Posted by blk05wrx View Post
For emissions, you want the cat as close to the engine/turbo as possible. That way it comes up to operating temperature and starts burning off the bad stuff as early as possible. So you may want to look at the Cobb J-Pipe.

It still won't pass a visual or sniff test, but if you have it tuned with no check engine lights, you'll pass an OBD scan inspection.
Thanks for that info. I assume you're talking about the catted Cobb j-pipe? It would still fail a visual even if they can see a cat?
Quote:
Originally Posted by Cisco Kidd View Post
Just need to decide if I add a killer b jpipe alone and stick with oem intermediate or if I go with catted invidia downpipe or grimmspeed offering, at this time the Killa B jPipe is the most budget friendly way to go so I can install it all and get a tune and enjoy
THIS is where Im at right now + q300.

Last edited by SpikeTi; 09-13-2015 at 01:29 PM.
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Old 09-14-2015, 08:06 AM   #3379
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Anyone know which is louder (or has to potential to be louder).....

Nameless axleback with the 4in mufflers (NOT the muffler deletes or 5in mufflers)

Vs

Invidia N1 dual catback
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Old 09-14-2015, 09:13 AM   #3380
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Originally Posted by SpikeTi View Post
Thanks for that info. I assume you're talking about the catted Cobb j-pipe? It would still fail a visual even if they can see a cat?

THIS is where Im at right now + q300.

It depends on the state, and who's looking. But in general you're not supposed to remove a working cat. If you service your car at a Subaru dealer, I'm sure they'll notice too. I waited until my 3/36k warranty expired before I put my Cobb catted DP on my 05. With a tune to turn off the CEL, I passed emissions as there was no visual inspection. The car still smelled a little bit b/c the Cobb cat didn't seem to burn off everything.

I'm keeping the stock DP on my 2016 STI. The gains don't seem worth the risk to me.
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Old 09-14-2015, 11:44 AM   #3381
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Originally Posted by ayau View Post
Just picked up the Tomei Ti exhaust for my 2015 WRX. It seems like the flange fits very tightly with the OEM cat. I was able to get the bolts through with the help of some vice grips. Do I need the Grimmspeed flange adapter?
I had the same issue and ditched the stock donut gasket until the grimmspeed adapter came in.

http://www.grimmspeed.com/stock-dp-a...dapter-subaru/
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Old 09-14-2015, 12:58 PM   #3382
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Exclamation Subaru WRX Exhaust Question???'

Hello guys... I am wondering if the 2015 Subaru wrx STI catback exhaust system fits on WRX 2015?, I would like to install the Supersprint (for 2015 WRX STI) in my WRX 2015. Can any one tell me?.

http://www.supersprint.com/ww-en/sub...-hp-2015-.aspx

I'm looking for this hardware:

* Center Exhaust (Resonated)
* Connecting "Y-Pipe"
* Rear & Left exhaust

Thanks a lot.
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Old 09-14-2015, 04:21 PM   #3383
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Quote:
Originally Posted by Mishimoto View Post
Thanks for the input guys. We did design our CBE to produce only slight increases in volume. Our intentions were stock-like volume during normal driving and amplified/improved noise during WOT.

Nice to hear you are enjoying the setup!



Thanks Dorian! Yeah, I would definitely take a look at the flange and make sure it is sealing properly. If not, picking up our adapter should eliminate any chance of a leak.

RSD put a nice video together which highlights the sound produce by our exhaust system. You can use this as comparison.

https://www.youtube.com/watch?v=1S-J2SfDH_k

Let me know what you find with the flange!

-John
So I got under the car and made sure everything was fitting together well. Maybe I am just getting older? I hate to say this but IMO there is a decent amount of drone between 2500-3000 rpm under load. For example going up a hill in that RPM range. Under cruising circumstances it is quiet tho.

Its like if you are at 20% or more accel it goes from a quiter rumble and then suddenly at 2500 RPMs the low frequencies get really loud and then disappear after 3k RPMS

Last edited by Dorian7; 09-14-2015 at 05:33 PM.
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Old 09-14-2015, 09:45 PM   #3384
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^ that's how I feel about my Tsudo with the APM front pipe it's tolerable but I'd really like to give Corsa a try and see if it gets any better
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Old 09-15-2015, 11:16 PM   #3385
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Had anyone heard or seen video of the single exit q300. I know it's been released for quite some time now, but can't seem to find anything.
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Old 09-16-2015, 01:59 AM   #3386
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Originally Posted by rich7930 View Post
^ that's how I feel about my Tsudo with the APM front pipe it's tolerable but I'd really like to give Corsa a try and see if it gets any better
From what i have been reading it seems like it might just be the nature of the beast to a degree unless there is a completly different muffler design (the Mishi looks like it's just straight though with the oval can). I think that Corsa might be a good option but it is really heavy. The thing is that I don't mind loud exhaust noises but it's the low frequency resonating in the cabin that I hate.
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Old 09-16-2015, 10:08 AM   #3387
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Anyone have a vid of the ETS "muffled" axleback? NOT the muffler delete of the "quiet" mufflers. This one.....

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Old 09-16-2015, 10:36 AM   #3388
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Quote:
Originally Posted by Dorian7 View Post
So I got under the car and made sure everything was fitting together well. Maybe I am just getting older? I hate to say this but IMO there is a decent amount of drone between 2500-3000 rpm under load. For example going up a hill in that RPM range. Under cruising circumstances it is quiet tho.

Its like if you are at 20% or more accel it goes from a quiter rumble and then suddenly at 2500 RPMs the low frequencies get really loud and then disappear after 3k RPMS
Getting "older" changes everyone. It brings a broader perspective and taste evolves. More things are considered than they once were. Likes and dislikes gain weight and definition.

You cannot change physics... without a properly designed and placed resonator an exhaust pipe is going to drone. Period. And, that resonator is going to modify the sound at the end of the pipe. In addition to removing a long pipe's resonance, it also shapes the engine exhaust note by removing junk noise. It's a case of, you cannot have your cake and eat it, too.

On a race car this doesn't matter whatsoever. A daily driver, however, driven by a mature adult, needs an exhaust that is primarily heard outside the car, not in it. Without a proper resonator the pipe, and the car, become a tuned system that produces a tone created by the resonant cavity of the pipe that then couples the cabin. We call the resultant note Drone.

I can't stand drone. And knowing now how it works I don't have to "try" exhaust solutions that are certain to create drone. Musical instruments exist because of the principles of resonance, and my car is a vehicle not a tuba. This is why I installed the STi intermediate pipe... and quit with the exhaust. My car now has a refined muscular exhaust that emits from the tips, instead of being a resonant node on a pipe. Proper, scientifically designed, resonator for the pipe. Zero influence on gas flow, absorbs dirty noise, and presents it to the mufflers to shape the engine's exhaust pulses into an Exhaust Note.

I couldn't be happier with the result. People outside notice it, people inside don't. It is puzzling to me why Subaru didn't include this pipe from the factory... except perhaps so the exhaust serves as a ragged unrefined link to the earlier idea of WRX which were wholly unrefined. But this is NOT the WRX of old and with this pipe the package is complete. I am happy with MY exhaust now.

Obviously, YMMV. Taste varies. Be happy.
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Old 09-16-2015, 12:34 PM   #3389
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Quote:
Originally Posted by Dorian7 View Post
So I got under the car and made sure everything was fitting together well. Maybe I am just getting older? I hate to say this but IMO there is a decent amount of drone between 2500-3000 rpm under load. For example going up a hill in that RPM range. Under cruising circumstances it is quiet tho.

Its like if you are at 20% or more accel it goes from a quiter rumble and then suddenly at 2500 RPMs the low frequencies get really loud and then disappear after 3k RPMS
Interesting, we did not detect any low rpm resonance with our CBE installed, even in combination with our 3" downpipe. Is your WRX stock aside from the exhaust? I think we've been speaking through PM about the exhaust, any chance you can send over a video? We've had a ton of positive feedback from our customers thus far, so I would like to see if we can diagnose the problem.

-John
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Old 09-16-2015, 12:43 PM   #3390
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Quote:
Originally Posted by Mishimoto View Post
Interesting, we did not detect any low rpm resonance with our CBE installed, even in combination with our 3" downpipe. Is your WRX stock aside from the exhaust? I think we've been speaking through PM about the exhaust, any chance you can send over a video? We've had a ton of positive feedback from our customers thus far, so I would like to see if we can diagnose the problem.

-John
Hi John,

I can certainly try and make a video to demonstrate what I am hearing. It is all stock other than the CBE. More to come...

Last edited by Dorian7; 09-21-2015 at 01:49 AM.
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Old 09-20-2015, 11:24 PM   #3391
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Originally Posted by RobbWRX View Post
Had anyone heard or seen video of the single exit q300. I know it's been released for quite some time now, but can't seem to find anything.
sorry for the late response.

i have one. it is quiet but noticeably louder than stock. better tone. fit is a1 and the kids love it. before that i had nameless deletes and that was just a no go.
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Old 09-21-2015, 01:14 PM   #3392
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Originally Posted by Dorian7 View Post
Hi John,

I can certainly try and make a video to demonstrate what I am hearing. It is all stock other than the CBE. More to come...
Thanks Dorian!
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Old 09-22-2015, 02:27 PM   #3393
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Is anyone running the SubiSpeed catback w/ a catless turboback set up? I currently have the PRL catless j-pipe/midpipe combo + Tomei ExpremeTi and I'm debating switching.

I loved the sound of the Tomei w/ the stock downpipe but now that I went catless I think it might be a bit much. Cold starts are loud AF and almost makes me feel a bit embarassed.
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Old 09-22-2015, 03:50 PM   #3394
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Just installed Corsa Catback on my 2016 STi and LOVE it. The sound is deep and rich. It's not raspy at all and there is no drone while cruising. Another plus is that it is relatively quiet under "normal" driving around town, but it definitely wakes up when doing some spirited driving. Fitment is very good but not a fan of the clamp system. I have a slight exhaust leak between what they call the axle pipe and the Y pipe. I will most likely go and get that connection welded. I also bought the one with the black exhaust tips and they look great.
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Old 09-22-2015, 04:53 PM   #3395
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This is going to sound really dumb, but which exhaust set up will make my 15 WRX sound most like an Abarth? I really like how an Abarth sounds with that unrefined, almost diesel, sounding exhaust. The turbo whistle is very pronounced but the engine is low and growly. Now, the reason the Abarth sounds the way it sounds is because it comes with straight pipes from the factory. That would seem to answer my question, but straight pipes are typically loud as hell. I don't want that. Partially because I don't want the attention, and partially because I still want to be able to race at places like Lime Rock where exhaust limits are at 88 dB. Extreme Turbo Systems says their exhaust with mufflers will get 86 dB, but it won't sound the way I want it. Am I just asking too much?
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Old 09-22-2015, 06:06 PM   #3396
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ive been skimming through this thread, and i was only looking for info on the invidia N1, so please dont crucify me..

does any one have the turboxs cat back on their wrx? how is the overall sound of it?
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Old 09-22-2015, 06:15 PM   #3397
shadow_772
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Anyone interested in a catted GrimmSpeed downpipe & ETS resonated catback video?
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Old 09-23-2015, 12:02 PM   #3398
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Originally Posted by shadow_772 View Post
Anyone interested in a catted GrimmSpeed downpipe & ETS resonated catback video?
Yes please, but all i can say is if you cant record decent audio don't bother It seems like a no brainer but I've seen so many videos that make exhausts sound horrible solely because of a bad mic or placement
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Old 09-24-2015, 06:50 AM   #3399
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Originally Posted by Bsinc42 View Post
Yes please, but all i can say is if you cant record decent audio don't bother It seems like a no brainer but I've seen so many videos that make exhausts sound horrible solely because of a bad mic or placement
And include a (standardised) sound meter reading, to give a guide to the actual noise level.
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Old 09-24-2015, 07:03 AM   #3400
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Picked up a used q300 from a local member for a good price but it needs gaskets. Anyone know where I can get some? or universals that might work? I'm sure they will be a fortune through INVIDIA
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