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ISS Performance IS-F QES Street / Track Exhaust

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Old 06-27-09, 09:09 PM
  #136  
Fitment Factory
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Probably none... I don't think the pipes sticking out a 1/4 inch more will alter the flow of air a significant amount... That's the only real difference.

but if you have rear diffuser issues there is nothing this can't solve.

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Old 06-29-09, 03:30 PM
  #137  
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So the Street System is now installed... I have to say it is significantly quieter and still has that don't mess with sound. We will be putting the ISF back on the Dyno tomorrow and will post the dyno sheet and a new video with the sound clip asap. I have to say, you ISF owners are very lucky. Lexus has really outdone themselves with this car.
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Old 06-29-09, 04:12 PM
  #138  
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that looks like a monster!
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Old 06-29-09, 04:42 PM
  #139  
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lol thanks...
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Old 07-02-09, 04:27 AM
  #140  
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I have been getting a lot of PM for the sound clip so here it is again...

http://www.flickr.com/photos/issperformance/3639929766/
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Old 07-02-09, 12:39 PM
  #141  
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Originally Posted by ISSForged
Probably none... I don't think the pipes sticking out a 1/4 inch more will alter the flow of air a significant amount... That's the only real difference.

but if you have rear diffuser issues there is nothing this can't solve.

Really, a bumper is going to give you down force? That is far from a real diffuser.
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Old 07-02-09, 01:37 PM
  #142  
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No the rear diffuser will diffuse the air better then the stock bumper.

Originally Posted by NoVa-isF
Really, a bumper is going to give you down force? That is far from a real diffuser.
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Old 07-02-09, 01:44 PM
  #143  
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I hope this helps. It was poster on another thread.

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Old 07-03-09, 02:32 PM
  #144  
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On so we finished the first two systems today. The system weighs 71lbs.... pics coming in a bit.
Last edited by Fitment Factory; 07-03-09 at 08:38 PM. Reason: Weighed the system wrong... Sorry guys
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Old 07-03-09, 03:19 PM
  #145  
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Last edited by Fitment Factory; 07-03-09 at 03:52 PM.
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Old 07-03-09, 03:49 PM
  #146  
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Just left after hearing the track system and I am really ready to have my system installed!!
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Old 07-03-09, 04:26 PM
  #147  
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Glad you like the system Splat. Can't wait to see it installed!
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Old 07-03-09, 07:08 PM
  #148  
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Originally Posted by ISSForged
On so we finished the first two systems today. The system weighs 75lbs.... pics coming in a bit.
Why is the exhaust so heavy? 75lbs is 5lbs heavier than stock.

Stock is 70lbs and the JoeZ is 64lbs with resonators.

Will you guys be making any more changes or is it now final?
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Old 07-03-09, 07:22 PM
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Originally Posted by caymandive
Why is the exhaust so heavy? 75lbs is 5lbs heavier than stock.

Stock is 70lbs and the JoeZ is 64lbs with resonators.

Will you guys be making any more changes or is it now final?
Hahahahaha!
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Old 07-03-09, 07:22 PM
  #150  
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I weighed it in the box and it weighed 78lbs. I figure 3lbs for the box so it's 75lbs more or less. We also have some extra flanges that give it the ability to convert to the street system without buying a new system. I'll weight it on a better scale at a friends shop without the box on Monday. The power increase you get out of the system is worth the weight. I will also weigh the stock system. It seem heavier then our system but only the scale can determine that.

Thanks for the heads up!
Last edited by Fitment Factory; 07-03-09 at 08:49 PM.
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