GT Performance Mods 2005+ Mustang GT Performance and Technical Information

MAC headers + prochambers from Brenspeed

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Old Jan 5, 2008 | 09:17 AM
  #21  
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Where would I be able to find the those header bolts? Seth from Brenspeed suggested Summit Racing, but he also said the bolts which come stock from the factory are pretty good too and they haven't had a problem. Suggestions?
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Old Jan 5, 2008 | 02:07 PM
  #22  
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Don't know the best place to get replacement bolts, but just wanted to share my own experience.

I installed FRPP shorties last spring/summer and I reused the factory gaskets and hardware. Just last week (6 months later and two weather seasons later) I installed new motor mounts and while under there, I checked my factory header bolts- they were all tight as can be..... no problems at all. I would suggest that the factory hardware is plenty good to use, although the aftermarket version ($$) is fine too.
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Old Jan 5, 2008 | 02:34 PM
  #23  
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Originally Posted by ufnavy06
Where would I be able to find the those header bolts? Seth from Brenspeed suggested Summit Racing, but he also said the bolts which come stock from the factory are pretty good too and they haven't had a problem. Suggestions?

If you are speaking of the Stage 8 bolts that I post about a few posts back I bought them on Ebay. I just came in from my longtube install about an hour ago. And I can say using this bolts with there retainers and E-clips is a pain and probably added about 1 hour to the install time. But they can't back off and loosen up.
Scott
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Old Jan 5, 2008 | 09:17 PM
  #24  
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Yeah I got the stage 8 bolts to play it safe.
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Old Jan 18, 2008 | 03:27 PM
  #25  
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Originally Posted by ufnavy06
I'm thinking about getting the MAC headers and prochambers from Brenspeed in their package. Has anyone gotten them, if so how do you like them? What kind of number improvement can i expect, if any?
Did you pulle the trigger on the set-up?
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Old Jan 21, 2008 | 08:44 AM
  #26  
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As we've been playing private message tag, yes I did.
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Old Jan 21, 2008 | 08:57 AM
  #27  
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Haha. Brenspeed just contacted me and its shipping today he pulled from another warehouse.
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Old Jan 21, 2008 | 12:30 PM
  #28  
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Originally Posted by ufnavy06
As we've been playing private message tag, yes I did.
Let us know how this goes. I was considering the same package but probably for the fall as I have to finish up suspension upgrades before this years track season...
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Old Jan 21, 2008 | 12:32 PM
  #29  
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If I could find someone to help me out with a good video of a drive by or such then I could complete the idea (sound etc)
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Old Jan 21, 2008 | 01:17 PM
  #30  
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Originally Posted by mot250
Let us know how this goes. I was considering the same package but probably for the fall as I have to finish up suspension upgrades before this years track season...
I ordered the same package. I'll give my two cents as soon as its installed.
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Old Jan 21, 2008 | 04:27 PM
  #31  
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From: New Carlisle, Ohio (20 miles north of Dayton)
Originally Posted by JonCo
I ordered the same package. I'll give my two cents as soon as its installed.


I am glad you decided what set to go with. Post us some pictures when they are installed.
Scott



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Old Jan 21, 2008 | 07:21 PM
  #32  
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Call MAC Directly .......they deal well with the military......They have a great facility in Cali. Did a tour of it back in October. Deal direct with them I think you will get a good deal.

Gib
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Old Jan 22, 2008 | 08:22 PM
  #33  
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Originally Posted by 70MACH1OWNER
I am glad you decided what set to go with. Post us some pictures when they are installed.
Scott



The prochamber videos you had made the choice easy. Lol not being a fabricator this wasn't an option to add on later.

They come in on friday!
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Old Jan 23, 2008 | 10:03 AM
  #34  
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Very nice.... you might be able to beat me to the punch on getting a good drive away video haha.
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Old Jan 24, 2008 | 09:36 PM
  #35  
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Here is a little bit of a drive by clip, my car is the one closest to the camera, MAC Longtubes, offroad prochamber and Flowmaster American Thunder Mufflers.

http://s25.photobucket.com/albums/c7...t=DSCF0622.flv
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Old Jan 24, 2008 | 10:01 PM
  #36  
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Originally Posted by Eleanor Dreaming
Here is a little bit of a drive by clip, my car is the one closest to the camera, MAC Longtubes, offroad prochamber and Flowmaster American Thunder Mufflers.

http://s25.photobucket.com/albums/c7...t=DSCF0622.flv
Ive never been a huge fan of Flowmaster but that sounds nice!
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Old Jan 25, 2008 | 07:24 AM
  #37  
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Originally Posted by Eleanor Dreaming
Here is a little bit of a drive by clip, my car is the one closest to the camera, MAC Longtubes, offroad prochamber and Flowmaster American Thunder Mufflers.

http://s25.photobucket.com/albums/c7...t=DSCF0622.flv

I heard the flows aren't much louder then the GTA's that true? I didn't hear any trumpeting but do you have any under hard accel?
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Old Jan 25, 2008 | 10:15 AM
  #38  
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Flows ARE louder than GTAs
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Old Jan 25, 2008 | 10:32 AM
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I just switched from GTA's to the Flows. I have LT's, off road X, both from Bassani, the GTA's were horribly barky. Very raspy and a lot of trumpeting, even at start up and mid rpms. The flows have a deeper growl, and sound really good through the mid range. The do bark at WOT, but I am gonna have that with headers and x-pipe.
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Old Jan 26, 2008 | 10:30 PM
  #40  
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Originally Posted by IowaBeef
I just switched from GTA's to the Flows. I have LT's, off road X, both from Bassani, the GTA's were horribly barky. Very raspy and a lot of trumpeting, even at start up and mid rpms. The flows have a deeper growl, and sound really good through the mid range. The do bark at WOT, but I am gonna have that with headers and x-pipe.
By bark do you mean trumpet? My LTs go in this week. I guess we'll see how bad it is...
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