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Old 12-13-2011, 05:38 PM   #1201
camasite
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Jason or John -- I am a Subie noobie, but spent two hours reading through this thread with great interest. An issue came up in the Cobb 2012 WRX AP thread about the sedan's exhaust being more restrictive than the hatch and costing it 10-15 horsepower. Specifically, Cobb had this to say:

Quote:
Originally Posted by Cobb Tuning View Post
We have not found any difference in power output/gains for 2012 vs. the prior year. Of course, different cars on different days will show differences obviously, even on the same dyno. This appears to be a case of sedan vs. hatch, where the sedan has a more restrictive stock exhaust (catback) than the hatch, so you'll generally see 10-15 whp difference between the cars (the 2012 dyno was a sedan) until you go stage 2 AND replace the stock catback.
Quote:
Originally Posted by Cobb Tuning View Post
It is just the catback portion that is different on the sedan starting at the y portion. IIRC, the diameter of the pipe after that point is smaller on the sedan. So, replacing the catback on the sedan will make a noticeable difference even with stage 1. We used a full turboback exhaust for stage 2 12' WRX testing.
Do you have an opinion on this? Specifically, I am wondering if you think it is the midpipe (perhaps the "y" piece as some have suggested) or the axleback that causes the loss. I have read many times (including in this thread) that the axleback will not affect horsepower, but I am wondering if that is not true in the sedan because of the factory muffler design? If it really is the midpipe that is the problem, that is unfortunate since it is a lot more $$ to replace. Thanks!
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Last edited by camasite; 12-13-2011 at 05:45 PM.
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Old 12-15-2011, 04:02 AM   #1202
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Hi guys, after browsing inthernet and reading your posts- just ordered an axleback for my 2012 STI , so will see how it will sound
---------------------------------------------------------
My idea is if its gonna be too loud for me i will make some sort of flow muffler
(since i own mechanic shop, ill be able to work something out)
pluss 300$ is worth of gamble.

---------------------------
And to NAMELESS guys - im canadian but will support small business instead of feeding those 1000$+ BRAND NAME companies = by the end of the day exhaust is just piping, i know it takes some ingeenering but it still PIPES.
So good luck and hope to deal with you again
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Old 12-15-2011, 01:17 PM   #1203
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Quote:
Originally Posted by v_khotsky View Post
Hi guys, after browsing inthernet and reading your posts- just ordered an axleback for my 2012 STI , so will see how it will sound
---------------------------------------------------------
My idea is if its gonna be too loud for me i will make some sort of flow muffler
(since i own mechanic shop, ill be able to work something out)
pluss 300$ is worth of gamble.

---------------------------
And to NAMELESS guys - im canadian but will support small business instead of feeding those 1000$+ BRAND NAME companies = by the end of the day exhaust is just piping, i know it takes some ingeenering but it still PIPES.
So good luck and hope to deal with you again
I too just placed an order for the axleback exhaust (staggered double walled, flush with valence). I wanted to thank Jason @ Nameless for answering my questions prior to placing my order (he responded within minutes of my original email; excellent service IMO). Ill post again once I have this bad boy installed!
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Old 12-15-2011, 04:44 PM   #1204
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Quote:
Originally Posted by v_khotsky
Hi guys, after browsing inthernet and reading your posts- just ordered an axleback for my 2012 STI , so will see how it will sound
---------------------------------------------------------
My idea is if its gonna be too loud for me i will make some sort of flow muffler
(since i own mechanic shop, ill be able to work something out)
pluss 300$ is worth of gamble.

---------------------------
And to NAMELESS guys - im canadian but will support small business instead of feeding those 1000$+ BRAND NAME companies = by the end of the day exhaust is just piping, i know it takes some ingeenering but it still PIPES.
So good luck and hope to deal with you again
I looked into buying a muffler for the axel back after I bought it. I couldn't find anything that would work and the muffler shop couldn't do anything for me either so I had to sell it. There isn't room to replace the resonator with a muffler and the bends in the np axel back make it imo not worth the effort/money to try and re-do to try and make a muffler somehow fit. I do sincerely wish you luck with that task if you too feel that its too loud. The closest muffler I could find is actually a resonator called vibrant ultra quiet. Hope that helps and good luck to you.
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Old 12-15-2011, 05:45 PM   #1205
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Do you guys have a full turbo back package?
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Old 12-16-2011, 01:59 AM   #1206
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Quote:
Originally Posted by PearlRex11 View Post
I looked into buying a muffler for the axel back after I bought it. I couldn't find anything that would work and the muffler shop couldn't do anything for me either so I had to sell it. There isn't room to replace the resonator with a muffler and the bends in the np axel back make it imo not worth the effort/money to try and re-do to try and make a muffler somehow fit. I do sincerely wish you luck with that task if you too feel that its too loud. The closest muffler I could find is actually a resonator called vibrant ultra quiet. Hope that helps and good luck to you.

Ill give you a litle tip for future

You dont need a muffler, and any pipe cutting
All you do is driling holes (from 20 to 200) in axleback where it relativly straight. And after put a sleeve about 2inches bigger in diameter. And weld around on a sides - AND YOU GOT STRAIGHT FLOW MUFFLER.
i have done about 100 of them for my customers , cars and few bikes.
Reason i dont mess around with my STI.

1 - its my car.
2 - i always run in to some s##t on my own vahicles
3 - nobody pays me to work on it.
4 - i dont have a pipe bender
5 - even if i got a bender , i rather pay 300$ and swap it in 20min
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Old 12-16-2011, 09:14 AM   #1207
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Quote:
Originally Posted by v_khotsky

Ill give you a litle tip for future

You dont need a muffler, and any pipe cutting
All you do is driling holes (from 20 to 200) in axleback where it relativly straight. And after put a sleeve about 2inches bigger in diameter. And weld around on a sides - AND YOU GOT STRAIGHT FLOW MUFFLER.
i have done about 100 of them for my customers , cars and few bikes.
Reason i dont mess around with my STI.

1 - its my car.
2 - i always run in to some s##t on my own vahicles
3 - nobody pays me to work on it.
4 - i dont have a pipe bender
5 - even if i got a bender , i rather pay 300$ and swap it in 20min
Same way we used to make silencers.
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Old 12-20-2011, 05:50 PM   #1208
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Is anyone here an ex-owner of the original muffler delete axle back, but have now purchased the new muffled axle back? If so, what is the sound difference like?

I sold the muffler delete axle back due to the loudness and would like to see what the new muffled version is life before purchasing.
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Old 12-20-2011, 09:50 PM   #1209
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I don't get all these people saying how the axleback is too loud...
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Old 12-20-2011, 10:00 PM   #1210
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Quote:
Originally Posted by xabre1200 View Post
I don't get all these people saying how the axleback is too loud...
I can see how it can be too loud if you are sitting in the backseat or have people sitting back there regularly. For them, it is loud. I won't cargo kids around in the back for extended periods of time. When I start to cargo kids around on a daily basis, my Nameless will come off and be sold
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Old 12-21-2011, 11:06 AM   #1211
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Looks like my NP axleback will be here today. Ill post up a review once I get it installed. I plan on re-using the original gaskets, but does anyone know the Subaru part number for these gaskets? I am 99% sure I found the part on Genuine Subaru, but I can't seem to find the actual Subaru part number to confirm. I can't wait to get this installed!
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Old 12-21-2011, 11:59 AM   #1212
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NP supplied a gasket(s) when I ordered
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Old 12-21-2011, 02:09 PM   #1213
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Quote:
Originally Posted by CO11WRX View Post
Looks like my NP axleback will be here today. Ill post up a review once I get it installed. I plan on re-using the original gaskets, but does anyone know the Subaru part number for these gaskets? I am 99% sure I found the part on Genuine Subaru, but I can't seem to find the actual Subaru part number to confirm. I can't wait to get this installed!
Stock gaskets should be reusable at this point. Assuming you don't have an absurd amount of miles on your car already, they'll be in good enough shape. So no worries there. Part number might be stamped into the gasket, I never bothered to look.

If you cant find it online just call up the local stealership parts department, they should be able to look it up fairly quickly I'd imagine.


Quote:
Originally Posted by honestabe View Post
NP supplied a gasket(s) when I ordered
Must be something new they're doing, I'm jelly. Thumbs up to them!
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Old 12-21-2011, 02:44 PM   #1214
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Quote:
Originally Posted by k757
I can see how it can be too loud if you are sitting in the backseat or have people sitting back there regularly. For them, it is loud. I won't cargo kids around in the back for extended periods of time. When I start to cargo kids around on a daily basis, my Nameless will come off and be sold
With just light throttle it bellows to me. Sounds too loud in comparison to how fast the car is moving. I don't feel like the car is fast enough to be that loud. Felt like a poser when I had it on. Just my opinion. I also didn't care for the rasp on the outside of the car. I wanted something a lot cleaner/smoother sounding. Maybe their muffled version accomplishes this, either way I love my q300 don't need to worry anymore about it.
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Old 12-21-2011, 03:46 PM   #1215
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Quote:
Originally Posted by PearlRex11 View Post
With just light throttle it bellows to me. Sounds too loud in comparison to how fast the car is moving. I don't feel like the car is fast enough to be that loud. Felt like a poser when I had it on. Just my opinion. I also didn't care for the rasp on the outside of the car. I wanted something a lot cleaner/smoother sounding. Maybe their muffled version accomplishes this, either way I love my q300 don't need to worry anymore about it.
everyone has their opinion and it's all good. But a poser? nah, even stock WRX/STI can not be called poser cars. I have had no non-quality cars pull alongside of me after I installed my NP axle back. But maybe around CT, the ricers know enough to not mess with a WRX/STI I think the NP axle back keeps the ricers away.... hahah, "ricer repellant"
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Old 12-21-2011, 03:52 PM   #1216
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Quote:
Originally Posted by k757 View Post
everyone has their opinion and it's all good. But a poser? nah, even stock WRX/STI can not be called poser cars. I have had no non-quality cars pull alongside of me after I installed my NP axle back. But maybe around CT, the ricers know enough to not mess with a WRX/STI I think the NP axle back keeps the ricers away.... hahah, "ricer repellant"
lolz.....
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Old 12-21-2011, 04:26 PM   #1217
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Quote:
Originally Posted by Callsign_Jester View Post
Stock gaskets should be reusable at this point. Assuming you don't have an absurd amount of miles on your car already, they'll be in good enough shape. So no worries there. Part number might be stamped into the gasket, I never bothered to look.

If you cant find it online just call up the local stealership parts department, they should be able to look it up fairly quickly I'd imagine.




Must be something new they're doing, I'm jelly. Thumbs up to them!
I have around 7,000 miles on the car so as you mentioned, they should be okay. The package actually arrived about an hour ago, but I didn't have time to open it up (was on lunch break when it arrived). It would be awesome if they did include new gaskets. Hopefully I can get around to installing the exhaust within the next few days. Thanks for the info!

Quote:
Originally Posted by k757 View Post
everyone has their opinion and it's all good. But a poser? nah, even stock WRX/STI can not be called poser cars. I have had no non-quality cars pull alongside of me after I installed my NP axle back. But maybe around CT, the ricers know enough to not mess with a WRX/STI I think the NP axle back keeps the ricers away.... hahah, "ricer repellant"


haha! lets hope thats the case!
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Old 12-21-2011, 05:02 PM   #1218
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I was going to start another thread for this question, but figured I would ask in here to keep it organized. I am a complete newb when it comes to modding/working on my car, so I apologize if this is a stupid question. Do I need to worry about over-tightening the 4 bolts? Is there a specific torque value I should be shooting for? I will be doing this with hand tools and definitely don't want to be breaking anything. I was planning on using two socket wrenches and just tightening them down as much as I can by hand.
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Old 12-21-2011, 05:06 PM   #1219
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Quote:
Originally Posted by CO11WRX
I was planning on using two socket wrenches and just tightening them down as much as I can by hand.
Roll with that. 4000 miles and mine haven't fallen off yet...
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Old 12-21-2011, 05:21 PM   #1220
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Roll with that. 4000 miles and mine haven't fallen off yet...
Will do...thank you!
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Old 12-22-2011, 03:31 PM   #1221
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Today is great day for my car , first fedex surprice me when they bring cobb tool, and an hour later ups delivered axleback , so i got some project for an afterwork
I will make some vids of axleback and post them.
Let me know if you want some specific info.
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Old 12-22-2011, 07:16 PM   #1222
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I love the sound of the NP axleback. Coming from a full exhaust on my previous car, this axleback has the best sound per dollar ratio. It's mean on the gas and mellow off. The sound at higher revs is pretty sweet IMO. I might have gone for the muffler version had it been out in time, but I'm not sorry. I've never wanted my Subaru's to sound environmentally friendly. :O
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Old 12-22-2011, 07:33 PM   #1223
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Quote:
Originally Posted by Callsign_Jester View Post
Stock gaskets should be reusable at this point.
Not too sure about that. My car had less than 1k miles and the stock gaskets were not reusable. They peeled. I bought new ones.
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Old 12-22-2011, 08:07 PM   #1224
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Quote:
Originally Posted by Zach9734
Not too sure about that. My car had less than 1k miles and the stock gaskets were not reusable. They peeled. I bought new ones.
I suppose your mileage may vary...
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Old 12-22-2011, 09:33 PM   #1225
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Quote:
Originally Posted by camasite
Jason or John -- I am a Subie noobie, but spent two hours reading through this thread with great interest. An issue came up in the Cobb 2012 WRX AP thread about the sedan's exhaust being more restrictive than the hatch and costing it 10-15 horsepower. Specifically, Cobb had this to say:

Do you have an opinion on this? Specifically, I am wondering if you think it is the midpipe (perhaps the "y" piece as some have suggested) or the axleback that causes the loss. I have read many times (including in this thread) that the axleback will not affect horsepower, but I am wondering if that is not true in the sedan because of the factory muffler design? If it really is the midpipe that is the problem, that is unfortunate since it is a lot more $$ to replace. Thanks!
I am interested in NP opinion on this.
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