Magnaflow muffler install - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 02-12-2015, 05:16 PM   #61
Junior Member
iTrader: (1)
 
Handsome Greg's Avatar
 
Join Date: Aug 2010
Posts: 94
Total Cats: 14
Default

Did not want. 12579 on the way, $127 shipped. Will orient in all possible positions and take tasteful photographs.
Handsome Greg is offline   Reply With Quote
Old 05-28-2015, 02:31 PM   #62
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,003
Total Cats: 14
Default

I keep forgetting to load some pictures of the installed exhaust.



Attached Thumbnails
Magnaflow muffler install-20150101_212529_resized_1.jpg   Magnaflow muffler install-20150101_212626_resized_1.jpg   Magnaflow muffler install-20150101_212648_resized_1.jpg   Magnaflow muffler install-20150101_212749_resized_1.jpg  
Rallas is offline   Reply With Quote
Old 05-28-2015, 02:51 PM   #63
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

That's not the 5x11x22 is it? Why does the NA look like it has so much more space for activities?
EO2K is offline   Reply With Quote
Old 05-28-2015, 02:58 PM   #64
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

Lookin good man

G - doesn't have the ladder brace.

I've done this method before, it's definitely cool, but on NB's you gotta make that bend pre-muffler much sharper and it comes out as a cheater bend, otherwise it won't clear the ladder brace (and even still you have like .000001" of room to play with)
18psi is offline   Reply With Quote
Old 05-28-2015, 03:03 PM   #65
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Fo sho, it does look great!

I actually considered going with the smaller Magnaflow for a while so we could copy this routing, but then you put the big one up for sale...
EO2K is offline   Reply With Quote
Old 05-28-2015, 03:07 PM   #66
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Quote:
Originally Posted by 18psi View Post
Lookin good man

G - doesn't have the ladder brace.

I've done this method before, it's definitely cool, but on NB's you gotta make that bend pre-muffler much sharper and it comes out as a cheater bend, otherwise it won't clear the ladder brace (and even still you have like .000001" of room to play with)
I tried doing it that for my setups, I could just never figure out a decent way to get around the brace and diff cleanly. If these big *** mufflers did not sound so good, I would love to use a smaller one to build my setups.
shuiend is offline   Reply With Quote
Old 05-28-2015, 06:51 PM   #67
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Quote:
Originally Posted by shuiend View Post
I tried doing it that for my setups, I could just never figure out a decent way to get around the brace and diff cleanly. If these big *** mufflers did not sound so good, I would love to use a smaller one to build my setups.
The double resonator and the normal sized borla setup I went with sounds good too ya know. And its quiet I have no idea if it drones but it makes less noise in the cabin than the AWR mounts at cruising speed.
Leafy is offline   Reply With Quote
Old 05-29-2015, 02:12 PM   #68
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,003
Total Cats: 14
Default

It looks extremely tight when you fit it up there, especially when routing 3" tubing. You definitely have to have stiff exhaust mounts, no oem old rubber junk since clearances get pretty tight. My closest spots only leave about 1/4" room for exhaust movement, but with poly hangers I have not had any rattling. If yo clock the 5x11x22 just right you can make it work. I even have enough room to re-install my trailer hitch!

It would be soooo easy to do in 2.5" tubing.

With a resonator you might be able to get away with a smaller muffler, but this one does sound awesome. It is a little noisy on the interstate doing 80 with my 4.3 rear end, but cruising 60 and below is very pleseant. It would be better if I swap in the 4.1 rear end.

I have considered adding a resonator like EO2k has on his new exhaust, but down know if my setup really needs it. I love the sound when you get on it and cruising around town is not obnoxios. I do have the louder straight through muffler comparted to the quieter one thats splits to two 2.5" tubes inside the muffler.
Rallas is offline   Reply With Quote
Old 08-17-2015, 02:44 AM   #69
Newb
 
Join Date: Nov 2004
Location: Brisbane, Australia
Posts: 21
Total Cats: 0
Default

Hi all,

Seeing as I heard of it here, I wanted to share a couple of pics of the Magnaflow 12579 install I had done on my turbo'd 94.

It's not a full 3" - because the reason for the exhaust work was to stop a rattle, and secondly I'm still running a tiny turbo in it.

Anyway, the pics:



The first exhaust shop I went to said it won't fit and it's not possible. I rolled my eyes, took my business elsewhere and they got it done with no problems.
Attached Thumbnails
Magnaflow muffler install-tnmagnaflow01.jpg   Magnaflow muffler install-tnmagnaflow02.jpg   Magnaflow muffler install-tnmagnaflow03.jpg  
sabretooth is offline   Reply With Quote
Old 01-16-2017, 03:53 PM   #70
Newb
 
Join Date: Dec 2016
Location: Houston, TX
Posts: 13
Total Cats: 0
Default quieter: MF 12578 or Borla Pro XS?

Guys, looking for definitive opinion on which is quieter at/around idle: Borla Pro XS 14" or Magnaflow 12578 (5x11x22). I'm replacing the fart can ebay muffler that came on the car, and need it quieter so I don't wake the kids and neighbors when I start it up. Drive the car 60mi roundtrip to work sometimes, so no drone would be a definite plus. Muffler shop swears that the Borla Pro XS will be quieter than even a big MF, plus it'd be way easier to mount since it's basically the same size as the one in there.

Either will be an improvement, but my head gets turned around reading through the threads here on which should be quieter, because I'm not always sure comparisons are apples to apples, and I'm guessing people have way different views on what loud means. The 22" MF 12578 seems to be a favorite for a good and quiet muffler, while other posts have guys saying the Borla is quieter than MF? Cost at muffler shop would be roughly the same: ~$140 installed.

Current setup is turbo, 3", no cat, no resonator. Do I need to add a resonator?

Thanks!
jpbro is offline   Reply With Quote
Old 01-16-2017, 03:58 PM   #71
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

I have not had a Borla on my car in 8+ years, so I can't really compare them. I use the big *** Magnaflow on my turbo setups and so far no one has complained about the noise level. I would highly suggest going with it if you want quite. Cheapest way to get them is from Advance Auto with the TRT41 or TRT30 coupon. You will also want to weld in a 4th exhaust hanger to help hold it up.
shuiend is offline   Reply With Quote
Old 01-16-2017, 05:19 PM   #72
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Borla ProXS... - LS1TECH

Quote:
Originally Posted by LS1Tech






The outside is perfect, but the inside IS AT BEST 2.5"..... IDK WTF Borla is thinking! im really pissed off. I dont want to send it back, i need it. However i cant put this muffler in and expect my engine to flow properly. Ill be running a cutout soon but still. That muffler would most like rob lots of power..
Seems legit.
EO2K is offline   Reply With Quote
Old 01-17-2017, 11:42 AM   #73
Junior Member
 
Join Date: Sep 2014
Location: Canton, GA
Posts: 153
Total Cats: -84
Default

Can confirm that my Vibrant Ultra Quiet resonator/muffler is the same way (This one: Vibrant Performance ::. ). 2.5" O.D., internal is like 2" I.D.... I don't like it, but Vibrant and Borla are doing it. I don't have the entitlement to dispute Borla's design, but not everyone has that self-control. Both companies offer a good product though, I have been satisfied with both in a couple different applications.
NBoost is offline   Reply With Quote
Old 01-17-2017, 12:01 PM   #74
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,877
Total Cats: 1,790
Default

that's stupid and defeats the point.
Braineack is online now   Reply With Quote
Old 01-17-2017, 01:34 PM   #75
Newb
 
Join Date: Dec 2016
Location: Houston, TX
Posts: 13
Total Cats: 0
Default

I'll be damned! Thanks guys, for the intel on Borla Pro XS. So, between the 12578 (straight through, offset/offset) and the 12579 (two parallel internal routes, center/center), it seems like they're both similarly quiet and flow well, and it just depends on which routing the muffler shop wants?

The $140 quoted includes the cost of the muffler itself and installation. Guess the shops can buy them for much cheaper than we can, even with our discount codes.
jpbro is offline   Reply With Quote
Old 01-17-2017, 01:44 PM   #76
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Quote:
Originally Posted by jpbro View Post
I'll be damned! Thanks guys, for the intel on Borla Pro XS. So, between the 12578 (straight through, offset/offset) and the 12579 (two parallel internal routes, center/center), it seems like they're both similarly quiet and flow well, and it just depends on which routing the muffler shop wants?

The $140 quoted includes the cost of the muffler itself and installation. Guess the shops can buy them for much cheaper than we can, even with our discount codes.
Yeah the difference between the 12578 and 12579 is just where the inlet and outlets are. Sound and performance should be about exactly the same.

If $140 includes the cost of the muffler and install then he is not making much on the install. I can guarantee that wholesale prices on magnaflow mufflers is more then the discount code and speed perks discounts you can get from Advance. But if he is willing to do it all for that price, I would jump on it and never look back.
shuiend is offline   Reply With Quote
Old 01-17-2017, 01:49 PM   #77
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by NBoost View Post
Can confirm that my Vibrant Ultra Quiet resonator/muffler is the same way (This one: Vibrant Performance ::. ). 2.5" O.D., internal is like 2" I.D.... I don't like it, but Vibrant and Borla are doing it. I don't have the entitlement to dispute Borla's design, but not everyone has that self-control. Both companies offer a good product though, I have been satisfied with both in a couple different applications.
My Vibrant Large Body 3" x 18" Bottle Style Resonator PN 17950 was NOT built as you describe. It's full 3" all the way through the core
EO2K is offline   Reply With Quote
Old 01-18-2017, 02:57 AM   #78
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,366
Total Cats: 1,328
Default

Quote:
Originally Posted by NBoost View Post
2.5" O.D., internal is like 2" I.D.... I don't like it, but Vibrant and Borla are doing it. I don't have the entitlement to dispute Borla's design
I do. What a stupid ******* idea.
Savington is offline   Reply With Quote
Old 01-18-2017, 08:17 PM   #79
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Quote:
Originally Posted by Savington View Post
I do. What a stupid ******* idea.
Its a win for DFMA, same muffler from end tank to end tank for the different pipe diameters, just tack different sized in/outlets on it. Its not their performance line of mufflers so seems like a reasonable sacrifice.
Leafy is offline   Reply With Quote
Old 04-19-2017, 08:59 AM   #80
Senior Member
Thread Starter
iTrader: (9)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,003
Total Cats: 14
Default

Quote:
Originally Posted by jpbro View Post
I'll be damned! Thanks guys, for the intel on Borla Pro XS. So, between the 12578 (straight through, offset/offset) and the 12579 (two parallel internal routes, center/center), it seems like they're both similarly quiet and flow well, and it just depends on which routing the muffler shop wants?

The $140 quoted includes the cost of the muffler itself and installation. Guess the shops can buy them for much cheaper than we can, even with our discount codes.
$140 installed is stupid cheap. Other than the wight of the huge muffler and extra work to fit that monster there is no downside to it. 3 years later and I am still very happy with mine.
Rallas is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:19 AM.