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Old 08-17-2012, 04:56 PM   #1526
_davin
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I recently came into a ceramic coated cobb downpipe, which I installed with my stock catback on my hatch. Now my buddy just came into a cobb downpipe that the cat has been gutted out of, and wants to trade with me just so his can be a little quieter. I eventually hope to get the GReddy SP Elite catback when I can afford it, and wanted the Nameless Performance downpipe because I like their design, but I don't have the money.

So anyways just wanted opinions on catted vs catless basically, I know it's been asked a million times but figured I'd throw it in here with specifics regarding the same downpipe and how it might have an effect on noise and power. Thanks.
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Old 08-17-2012, 05:13 PM   #1527
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Quote:
Originally Posted by _davin
I recently came into a ceramic coated cobb downpipe, which I installed with my stock catback on my hatch. Now my buddy just came into a cobb downpipe that the cat has been gutted out of, and wants to trade with me just so his can be a little quieter. I eventually hope to get the GReddy SP Elite catback when I can afford it, and wanted the Nameless Performance downpipe because I like their design, but I don't have the money.

So anyways just wanted opinions on catted vs catless basically, I know it's been asked a million times but figured I'd throw it in here with specifics regarding the same downpipe and how it might have an effect on noise and power. Thanks.
Boost creep with cat less can happen
It makes the exhaust more raspy sounding
Illegal modification going with no cat lol

That's it
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Old 08-17-2012, 05:18 PM   #1528
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Quote:
Originally Posted by _davin View Post
I recently came into a ceramic coated cobb downpipe, which I installed with my stock catback on my hatch. Now my buddy just came into a cobb downpipe that the cat has been gutted out of, and wants to trade with me just so his can be a little quieter. I eventually hope to get the GReddy SP Elite catback when I can afford it, and wanted the Nameless Performance downpipe because I like their design, but I don't have the money.

So anyways just wanted opinions on catted vs catless basically, I know it's been asked a million times but figured I'd throw it in here with specifics regarding the same downpipe and how it might have an effect on noise and power. Thanks.
well, there's the environment to consider too. i believe catted is more quiet at the expense of minimal power loss. resonated mid pipe is another variable in the noise/sound equation. i also did not want to deal with boost creep. i'm making 332hp/375 ft-lb with the catted, so i don't think it's holding me back too much
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Old 08-17-2012, 06:35 PM   #1529
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Quote:
Originally Posted by Jdub.csu

Boost creep with cat less can happen
It makes the exhaust more raspy sounding
Illegal modification going with no cat lol

That's it
Catted
https://www.youtube.com/watch?v=HBcd...e_gdata_player
Catless
https://www.youtube.com/watch?v=yNWT...e_gdata_player
As others have said.. Much louder, but not a lot of power change.. (in an aftermarket catted vs. catless dp)

Last edited by Louie; 08-17-2012 at 08:17 PM.
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Old 08-17-2012, 06:52 PM   #1530
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Stock catted dp vs aftermarket dp? That's what I'm seeing in that video.

That's not an accurate comparison unless that's what he was asking. I thought he was asking aftermarket catted dp vs non catted aftermarket dp
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Old 08-17-2012, 08:12 PM   #1531
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Aftermarket catted vs. aftermarket catless downpipe is barely any change in sound.

You can get boost creep with either, but it's more likely with catless (which basically proves how much better flow you're getting).
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Old 08-17-2012, 08:15 PM   #1532
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Quote:
Originally Posted by Jdub.csu View Post
Stock catted dp vs aftermarket dp? That's what I'm seeing in that video.

That's not an accurate comparison unless that's what he was asking. I thought he was asking aftermarket catted dp vs non catted aftermarket dp
You wont notice the difference (audibly) between an oem catted dp and a bellmouth or any other catted dp. I don't have clips of my own car; however, driving and modding these things for the last 10 years.. you won't notice the difference in exhaust noise. I concede that the power difference is much different and my example illustrates a worst case scenario (catless and non-resonated).

Quote:
Originally Posted by xluben View Post
Aftermarket catted vs. aftermarket catless downpipe is barely any change in sound.

You can get boost creep with either, but it's more likely with catless (which basically proves how much better flow you're getting).
I respectfully disagree..sort of. To clarify, I noticed differences between a non-resonated midpipes and CBE, in respect to exhaust volume. The resonated midpipes really (as you said) there isn't much of a difference

Last edited by Louie; 08-17-2012 at 08:20 PM.
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Old 08-17-2012, 08:18 PM   #1533
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Quote:
Originally Posted by Louie

You wont notice the difference (audibly) between an oem catted dp and a bellmouth or any other catted dp. I don't have clips of my own car; however, driving and modding these things for the last 10 years.. you won't notice the difference in exhaust noise. I concede that the power difference is much different.
I disagree 3"catted dp to stock exhaust here is louder than the oem dp + stock exhaust. Minimal but it is. Catted dp vs cateless dp just some rasp you get with catless from my experience noise wise no difference power wise not much difference till you get to bigger numbers.

Then if you go externally waste gated it doesn't really matter.
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Old 08-17-2012, 08:47 PM   #1534
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Quote:
Originally Posted by Jdub.csu View Post
I disagree 3"catted dp to stock exhaust here is louder than the oem dp + stock exhaust. Minimal but it is. Catted dp vs cateless dp just some rasp you get with catless from my experience noise wise no difference power wise not much difference till you get to bigger numbers.

Then if you go externally waste gated it doesn't really matter.
I agree that there isn't a power difference between the catted dp and a catless dp until you get to unreal power levels. Maybe my hearing is slipping at my old age. I really didn't notice a difference between my OEM DP and my Invidia Catless DP.
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Old 08-17-2012, 09:28 PM   #1535
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Thanks for all the input, more of a response than I expected, lol appreciate it.
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Old 08-18-2012, 09:05 AM   #1536
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Quote:
Originally Posted by 2.5TurboWRX View Post
So I met up with a local 2012 WRX sedan owner last night who is running the 5" muffled nameless exhaust with the stock downpipe/midpipe and all I can say is WOW!!! The idle was hardly louder than my stock exhaust but it had that nice, deep boxer rumble to it, normal driving was only slightly louder than stock (without the annoying drone between 1500-2000 RPMs) and while cruising on the highway I couldn't even tell he had an exhaust. In all honesty I was shocked at how great it sounded. The videos and sound clips on youtube of the NP 5" muffled axle back just don't do it justice! After driving my car with an SPT cat back exhaust for 1800 miles I was afraid that almost any aftermarket exhaust was going to be too loud for my wife. But the NP 5" muffled axle back had such a soft mellow rumble and was so much quieter in the cabin that my SPT Exhaust that I have no doubt that it will be wife and baby approved! In fact, I was so impressed that I placed an order for the 5" muffled version of the axleback with the 3.5" staggered double wall tips last night! I can't wait to get it and see/hear it on my car. That and the amount of drone in the stock WRX exhaust is getting old fast. Yeah, it's quiet at the higher RPMs but man is it annoying at cold start idle and while driving low speeds...

Thinking ahead (and for those of you who are already stage 2) I don't know how this exhaust will sound with an upgraded downpipe (especially catless) but for the stock downpipe and a stage 1 tune, I think it is perfect. If it gets too loud after I go stage 2 I will order the NP resontated and muffled mid pipe which should quiet it back down. So far I am super impressed by the customer service at NP and the selection and quality of their products. I'll be sure to post pics and a sound clip or two once I get my exhaust and get it on the car.

BTW, for those of you who have the WRX sedan and are looking for a "quiet" exhaust, I will warn you now that the SPT is not as quiet as everyone seems to think. It sounds awesome, don't get me wrong, but it has a lot of drone and produces a lot of extra cabin noise at lower RPMs. I would be willing to say it is not the "quietest" exhaust available and it might even be one of the loudest. Just my .02 cents...
Thanks for this info! I've commented on the stock exhaust drone and most people say "bro, you won't like any aftermarket exhaust if you think the stock exhaust drones, bro". Please post pics and a video if possible once you get the exhaust installed.
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Old 08-18-2012, 10:12 AM   #1537
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Do NOT use his results as a basis for your decisions. He has a sedan. You have a hatch. Completely different. This is how misinformation starts. The hatch stock exhaust is the quietest you're going to find.
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Old 08-18-2012, 03:20 PM   #1538
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Listen to him ^ as he knows his stuff!

However, keep in mind that it's not always the "loudness" of the exhaust that bothers people. Excessive vibration or drone bothers most people more than the actual volume. While I've never heard a stock hatch exhaust I can imagine if the low RPM drone is anything like the stock sedan exhaust, it gets annoying fast. That's why I have no problem upgrading to a slightly louder setup overall because I've now heard it in person and I know it sounds better in the cabin than the stock and SPT exhaust. And those two exhausts are "supposed to be" the quietest exhausts you can get on a sedan, again touching on my point about loudness (volume) versus vibration/reverberation (drone).
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Old 08-18-2012, 04:31 PM   #1539
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I agree I don't care how loud an exhaust is but I can't stand drone lol
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Old 08-20-2012, 06:09 PM   #1540
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Has anyone heard in person how the Nameless 5" muffled setup for the hatch compares to SPT or GReaddy SP Elite?
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Old 08-20-2012, 06:23 PM   #1541
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Originally Posted by xabre1200 View Post
^How do companies justify selling piece of metal for $1200.00+ Honestly I don't think I could pay more than $700 on a catback.

i had wrx 2008 and make it the same with sti from behind (4 exhauste )
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Old 08-20-2012, 06:23 PM   #1542
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thanx for this video nice sound
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Old 08-21-2012, 08:01 AM   #1543
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hey guys quick question..
anyone with a Nameless Performance Catback?
i noticed some rattling noise ate low rpms between 1k-2k. the only thing i can think of is the heat shield? any ideas?
or maybe i need new exhaust hangers?
thanx

Last edited by FerdSimao; 08-21-2012 at 08:18 AM.
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Old 08-21-2012, 10:30 AM   #1544
Jdub.csu
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Quote:
Originally Posted by FerdSimao
hey guys quick question..
anyone with a Nameless Performance Catback?
i noticed some rattling noise ate low rpms between 1k-2k. the only thing i can think of is the heat shield? any ideas?
or maybe i need new exhaust hangers?
thanx
Put it on a lift and inspect with someone raising the revs
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Old 08-21-2012, 10:41 AM   #1545
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yeah im planning on doing that im just not sure if i'll be able to get on a lift at work today, im thinking i might have to get a new exhaust hanger for the middle part, maybe that will help .
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Old 08-22-2012, 07:58 AM   #1546
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ok exhaust rattle fixed!!!
kartboy exhaust hangers did not work, great product, but it brought the exhaust even colser to the frame, because they are very stiff!
kartboy XL exhaust hangers also did not work, well it did work, solved the rattle problem but put the exhaut too low and i would scrape everywhere, hahaha
solution was hammer the **** out of the heat shield above the midpipe, and grind down one bolt from the v-band clamp so it wouldnt scrape!
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Old 08-22-2012, 10:18 AM   #1547
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Quote:
Originally Posted by FerdSimao View Post
ok exhaust rattle fixed!!!
kartboy exhaust hangers did not work, great product, but it brought the exhaust even colser to the frame, because they are very stiff!
kartboy XL exhaust hangers also did not work, well it did work, solved the rattle problem but put the exhaut too low and i would scrape everywhere, hahaha
solution was hammer the **** out of the heat shield above the midpipe, and grind down one bolt from the v-band clamp so it wouldnt scrape!
I'm actually experiencing some kind of rubbing/rattle right now on the stock mid pipe. I just reinstalled my OEM cat back two weeks ago and now everytime I shift I hear a noise from almost directly under my seat. It didn't make that noise with the SPT Exhaust so I'm thinking it's either the heatshield or the bushing on the midpipe is about to fall off. I need to get under my car tonight and investigate. According to UPS my Nameless Performance 5" muffled axle back is due to arrive on Monday and I'd like to fix this problem before I install it. That and I still need to put some dynamat on the rear deck lid to kill some of the vibrations from the road...
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Old 08-22-2012, 11:48 AM   #1548
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tell u what u will love nameless, i have their catback with the 4inch muffler on the axle back portion and i couldnt be happier
good luck fixing ur noise issue. it should be easy to spot once u have the car on the lift..
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Old 08-22-2012, 03:15 PM   #1549
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After a month of downtime, first startup was yesterday, exhaust at Idle.

Its stock I swear

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Old 08-22-2012, 09:27 PM   #1550
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^^^^^ sounds perfect !!!!
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