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Old 12-29-2008, 06:04 PM   #61
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Default 22"/3" o/o Magnaflow install

Quote:
Originally Posted by patsmx5 View Post
...But FWIW, a 22 could be made to fit.
Pat is right. Though I went with the offset/offset. Not finished yet, but the hard part is resolved. I think the offset/offset minimizes bends and makes the install easier. Clearance considerations: rear sway bar for height, the rear frame post at the exhaust exit and the diff housing at the rear. I don't think any of the OE hanger posts will work because of the muffler size and position. SST Note: pipe type jack stand with a hole drilled and nut welded to it for infinite adjustability- awesome for exhausts built on jackstands.



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Old 12-30-2008, 12:57 AM   #62
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Awesome! This is the 5x11x22 Magnaflow right? Please post more pics when you are finished.
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Old 12-30-2008, 09:32 AM   #63
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It's 6x12x22 12578. The 18" can is 5x11x18.
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Old 12-30-2008, 10:37 AM   #64
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There's the 14589 (center/offset) and the 12579 (center/center) which are also 6x12x22.

Frank
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Old 12-30-2008, 12:28 PM   #65
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I've got 2.5" with a cheap "high flow" ebay cat and a straight through 18" magnaflow muffler. It's louder than stock but it's very deep and doesn't drone at all. I love it. It sounds a lot like most of the others here.
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Old 01-03-2009, 08:44 PM   #66
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Fits nicely with minimal bends and it IS quiet at idle and low rpm. Have yet to romp on it- still more stuff to do while the car is up. Here's install pics and a vid with some idle and low rpm revs.



I used one of the rear tie down posts to bolt up some plate with a hanger stud on the end. Makes for easy install/removal vs. pulling the hanger.


Used the stock hangers on the exit side by just bending them up.


A little over an inch clearance at the diff case and sway bar at the closest point.


Yeah- it's quiet, but there is a deep tone that isn't making it on youtube. This is with a 3" from the internal wg housing all the way back, 200 cell metal cat and 18" glass pack with the louver openings facing oncoming exhaust.
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Old 01-03-2009, 10:12 PM   #67
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Nice! Thanks for the pics (and vid). Also regarding the muffler dimensions...
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Originally Posted by m2cupcar View Post
It's 6x12x22 12578. The 18" can is 5x11x18.
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Originally Posted by fmowry View Post
There's the 14589 (center/offset) and the 12579 (center/center) which are also 6x12x22.
Magnaflow doesn't appear to offer any 6x12 ovals. If you check out the Magnaflow site 12578 is listed as a 5x11x22 inch oval. ...but, I've never had my hands on one so I can't vouch for the actual dimensions.
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Old 01-03-2009, 10:19 PM   #68
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Quote:
Originally Posted by m2cupcar View Post
18" glass pack with the louver openings facing oncoming exhaust.
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Old 01-03-2009, 10:29 PM   #69
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I didn't measure the can, just lifted the specs from p-peddler's site. It's big either way, but it does fit with minimal bends regardless of size. Though I think you'd have to go with the offset/offset for the area round the diff. Build it w/o the glasspack and if it's too loud add it in. It was already welded in from the previous setup so I left it in... for maximum hush.
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Old 01-15-2009, 03:51 PM   #70
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this thing is incredibly quiet at idle, daily driving and under load = awesome

I did a rear shot in an effort to get some audio- all the rattles and squeaks in my car are louder than the exhaust.

Here's a 1-2-3 roll on acceleration with lots of wheel spin- I even rolled into the throttle in 2nd but as I got the pedal down the tires still broke loose. It's just too cold for traction right now. That's followed by steady state hwy cruise and then a 4th gear run from <2k to just under 7k rpm.

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Old 01-15-2009, 03:59 PM   #71
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Quote:
Originally Posted by MazDilla View Post

I have the same 18" louvered resonator; whatcha' going to do about it?



Joe sounds great!!! I'm jealous....do me on it.
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Old 01-15-2009, 04:02 PM   #72
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You know, I must admit my exhaust got really really quiet after putting the turbo on. I really wasn't expecting this big of a drop in noise. It's very acceptable, and I'm picky on loud exhaust. Mine is a touch louder than stock at any RPM or load.
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Old 01-15-2009, 05:11 PM   #73
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Just watched the video. Quiet FTW. And quick too.
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Old 01-15-2009, 05:20 PM   #74
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I'm thrilled. I gotta say I was skeptical even though Y8s and Jason testified to quietness of the big one, but I'm a believer now. Not quick enough.
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Old 01-15-2009, 05:29 PM   #75
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Quote:
Originally Posted by m2cupcar View Post
I'm thrilled. I gotta say I was skeptical even though Y8s and Jason testified to quietness of the big one, but I'm a believer now. Not quick enough.
Yeah, mine's probably as quiet or quieter actually. Turbo, 2 24" lourved glasspacks, then a 27" lourved glasspack, then a 18" core Magnaflow and 3" out the back (will eventually be a 2.5" tip). All glasspacks with the lourves pointing for maximum drag.

And for the "not quick enough" part: I so gotta build a motor.
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Old 02-06-2009, 12:10 AM   #76
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Did a datalog after install to check spool. The after pull was actually two degrees warmer ambient. Nice difference.
Fourth gear pull:
RPM....psi b4...After
  • 2500......2.......2
  • 3000......4.......4.8
  • 3550......8.......10
  • 3750......10.....12.6
  • 4000......12.....16
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Old 05-12-2010, 01:40 PM   #77
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I'm looking at the Magnaflow 12579 for my NB, would it be an easier install for the muffler shop to go with the the center / offset or the offset / offset model instead ?

I have a hitch on there (mtb and motocross bike needs) so it might be a bit more tight than normal.
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Old 05-12-2010, 01:56 PM   #78
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I just ordered 12589 on tuesday...It's $20 cheaper than 12789, so I mean the choice is easy.

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Old 05-12-2010, 01:59 PM   #79
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Order 2 and some pipe and build me one up for my NB. I'll send real Canadian dollars down there - a whole bunch of them.

I wish we had your US prices, sigh.....
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Old 05-12-2010, 02:13 PM   #80
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sorry?

Ordered from performancepeddler.com for 99.87 shipped, and then for piping I bought (2) U-bends and some straight for $40 shipped from mandrelbends.com
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