GT Performance Mods 2005+ Mustang GT Performance and Technical Information

SLP “LoudMouths” revisited

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Old Jul 2, 2006 | 10:46 PM
  #21  
Tres Wright's Avatar
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I just heard SLPs for the first time (in person) today. The sound clips posted on the internet do not convey just how loud they are, they are obnoxious. The trumpeting it horrible too! I'm a big fan of loud, but SLPs are not what I would consider a "good" loud sound.
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Old Jul 3, 2006 | 12:28 AM
  #22  
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maybe you heard an off road SLP setup? that is obnoxious. The SLP with stock cats however is very muscular and tight sounding without the slightest trace of trumpets.
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Old Jul 3, 2006 | 01:05 AM
  #23  
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Originally Posted by 05BLKGT
I think I'm going to call SLP first and see what they will do. Their website states that "Headers and exhaust components are warranted for life against rust, corrosion, failed welds, cracks, and similar defects under normal use." Hopefully they will replace my Loudmouths and if not I'm switching to the stingers.
Oh Cool ... I hadn't read that, let us all know what they say. Even though I already ordered the borla's it would be nice to have a new set of SLP's ....
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Old Jul 3, 2006 | 11:09 AM
  #24  
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Originally Posted by emperorjordan
maybe you heard an off road SLP setup? that is obnoxious. The SLP with stock cats however is very muscular and tight sounding without the slightest trace of trumpets.
I'm with Jordan... my favorite sound so far has been the LMs with the stock cats in place. And you know how much I hate trumpets... there wasn't any with that setup. I wish I could get that sound back, but I'm not about to ditch the LTs just for sound.
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Old Jul 4, 2006 | 12:22 AM
  #25  
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hey don, I know you would take a power hit, but how about fabbing up the stock cats to bolt in....... lol, $17k and 200 days too late, my sugggestion is.
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Old Jul 4, 2006 | 06:42 PM
  #26  
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Originally Posted by emperorjordan
hey don, I know you would take a power hit, but how about fabbing up the stock cats to bolt in....... lol, $17k and 200 days too late, my sugggestion is.
They're so frikkin huge, I'm not even sure where you could put them. Not that I'd do it anway. lol
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Old Jul 13, 2006 | 07:24 AM
  #27  
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Someone help me out. WTF is "trumpeting"?
I have SLP LM's and like them.
Had the Corsa's and liked them, but a little on the "too quiet" side. Take the Corsa sound and turn up the volume and you'd have the PERFECT exhaust. But for now the LM's are great.
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Old Jul 13, 2006 | 10:50 AM
  #28  
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Originally Posted by emperorjordan
The SLP with stock cats however is very muscular and tight sounding without the slightest trace of trumpets.
I'll second that . . . also, I've had mine on since May 2005, have 35k miles on the setup and no cracks or tickets .
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Old Jul 13, 2006 | 11:21 AM
  #29  
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Originally Posted by BillR
Someone help me out. WTF is "trumpeting"?
I have SLP LM's and like them.
Had the Corsa's and liked them, but a little on the "too quiet" side. Take the Corsa sound and turn up the volume and you'd have the PERFECT exhaust. But for now the LM's are great.
well, I wanted to turn up the volume on the SLPs a bit.... off road pipe, and its insanely obnoxious wiht harsh trumpets.... highfow cats and it sound all weak and ****ty. soooo as nice as it is in theory to just "turn up the volume a bit" it really doesnt work like that.

the trumpeting sound is like a BAP BAP BAP kinda noise that you get at part throttle in the mid rpms.... think old chevy gardners truck lugging second gear and its got a blown header gasket.... or the BAP BAP BAP of a cropduster.... i dunno, don is better at explaining it. lol
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Old Jul 14, 2006 | 12:34 PM
  #30  
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Originally Posted by emperorjordan
well, I wanted to turn up the volume on the SLPs a bit.... off road pipe, and its insanely obnoxious wiht harsh trumpets.... highfow cats and it sound all weak and ****ty. soooo as nice as it is in theory to just "turn up the volume a bit" it really doesnt work like that.

the trumpeting sound is like a BAP BAP BAP kinda noise that you get at part throttle in the mid rpms.... think old chevy gardners truck lugging second gear and its got a blown header gasket.... or the BAP BAP BAP of a cropduster.... i dunno, don is better at explaining it. lol
That's about right... a "bap bap bap bap" cropduster sound at around 2500rpm under partial throttle.
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Old Jul 19, 2006 | 10:12 AM
  #31  
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Did you guys get your slp's warrantied? I am very curious and hope you get it taken care of!
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Old Oct 20, 2006 | 07:25 PM
  #32  
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Where are you finding the 5GTs for $330?
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Old Oct 4, 2007 | 05:50 AM
  #33  
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bump
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Old Oct 4, 2007 | 09:09 AM
  #34  
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Originally Posted by metroplex
Where are you finding the 5GTs for $330?
The cheapest new set I've seen were $419 on ebay, sold by blue oval. I've not seen a new set for as low as $330 recently.
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Old Oct 4, 2007 | 09:38 AM
  #35  
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My SLP Powerflow set failed the same way the Loudmouths have done, the hole looks the same and it's obvious that the weld wasn't very good. Now I have a problem, the shop I bought them from is going to get only the failed section of the exhaust replaced, not the whole thing. I don't want those on my car anymore, I got the FRPP GTA's. I want my money back, it was only 4 months between purchase and failure. What should I do? I paid with a credit card so I could call and dispute the charge.
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Old Oct 4, 2007 | 11:19 AM
  #36  
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I've had my LM's on since June 05 and still no problems. I'm planning on get LT Headers soon and will probably change out the LM's. Not sure of what to go with that will have that deep muscle car sound.
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Old Oct 4, 2007 | 09:02 PM
  #37  
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I've had my SLP's since Oct. 2005 with no problems here either....
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Old Oct 7, 2007 | 06:13 AM
  #38  
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whs
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I've got the Loudmouths on my '06, no problems with them at all. Unless of course you'd count every toothless redneck hillbilly from miles around revving and trying to race me with their 4x4 or diesel pickup trucks, no I'm not trying to race you. Or retarded KU fans mouthing off as they stagger drunk down the street.

An added benefit is you can drown out other driver's phone conversations while driving down the road. That alone almost makes the rest worth it. Some sound insulation would probably take care of the WOT sound increase as well as the road noise at highway speeds.
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