IS F (2008-2014) Discussion topics related to the IS F model

Question about headers

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Old 05-20-16, 08:56 PM
  #16  
tas02
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Just returned from an 80 mile drive. Headers rock.
Old 05-21-16, 08:35 AM
  #17  
MileHIFcar
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I know I can't wait to get mine

Did you feel any loss in power down low? Meaning were all the gains realized in the upper band because of the loss of backpressure?
Old 05-21-16, 10:06 AM
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jspecvtec
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Originally Posted by MileHIFcar
I know I can't wait to get mine Did you feel any loss in power down low? Meaning were all the gains realized in the upper band because of the loss of backpressure?
No it should be more power anywhere. Dyno starts at 2000 rpm and it shows higher power and torque all the way to redline. I don't think there is a difference under 2000 rpm either
Old 05-21-16, 10:48 AM
  #19  
tas02
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No power loss was felt at any rpm.

I installed an Apexi throttle controller soon after the header & exhaust. When in Sport mode and the controller on it's "high" (red) setting (the only way I drive), throttle response can only be described as "immediate" at all rpms.
Old 02-08-20, 06:52 PM
  #20  
BIGBCHIRAQ
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Default In regards to passing emissions.

Originally Posted by BS ISF
They maybe true in Maryland but the O2 sims will not pass the readiness test here in Illinois.
(Actually that comment isn’t true, I’ve passed IL emissions with the conditioners and No Cats. Speak from experience not from an assumption...
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