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

Gutted manifolds vs headers

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Old 03-04-19, 06:18 PM
  #31  
FFM
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It doesn’t change the fact that the factory manifold is a joke. 3 cylinders merging into one and then a pinched section prior to the cat.

Its easily the biggest power adder for a simple bolt on so why not just splurge for some headers.
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Old 03-04-19, 06:25 PM
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Originally Posted by FFM
It doesn’t change the fact that the factory manifold is a joke. 3 cylinders merging into one and then a pinched section prior to the cat.

Its easily the biggest power adder for a simple bolt on so why not just splurge for some headers.

1) Im Broke (just cheap... lol)

2) Live in CA, so I need to pass visual
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Old 03-04-19, 07:20 PM
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Originally Posted by OneFastF
1) Im Broke (just cheap... lol)

2) Live in CA, so I need to pass visual
You can't see the headers in this car. Do they look from underneath?
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Old 03-04-19, 07:32 PM
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Originally Posted by Joker4096
You can't see the headers in this car. Do they look from underneath?

You can see it from underneath, Im missing my secondaries already, but I'll fab it up to connect to my x force axle back... plan to put those on if the Smell is that bad. Probably go H pipe reasonatorless since the cats should absorb the sound.
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Old 03-04-19, 08:04 PM
  #35  
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Originally Posted by OneFastF
You can see it from underneath, Im missing my secondaries already, but I'll fab it up to connect to my x force axle back... plan to put those on if the Smell is that bad. Probably go H pipe reasonatorless since the cats should absorb the sound.
The smell is pretty strong. I have no cats at all. Search X vs H pipe dynoes and you’ll see X is better.
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Old 03-04-19, 08:10 PM
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Originally Posted by ISFpowered


The smell is pretty strong. I have no cats at all. Search X vs H pipe dynoes and you’ll see X is better.
I know X is better, but I want a different deeper sound to the car. I know an ISS system has X and H , but no clue why. Hah
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Old 03-04-19, 08:58 PM
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If you want different deeper sounds you would have to play with different size pipping, resonators and mufflers. I tried it out on a Nissan and it drastically changes everything. For the ISF I found PPE headers with a Borla exhaust is perfect. Not loud when cursing and nice growl when WOT.
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Old 04-24-19, 10:20 PM
  #38  
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Originally Posted by SebaSTiSF
Hey guys resurrecting this thread, so just did a thing.. got my exhaust guy to work miracles and he manged to get a straight pipe welded in the gutted header cats to get rid of that hollow chamber. Wanted to share the results with you guys.
I may do this to........so does this set the CEL off?
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Old 04-24-19, 10:25 PM
  #39  
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^^^^Without tricking the ECU, you will have a CEL.

Lou
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Old 04-24-19, 10:41 PM
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Originally Posted by Marth06
I may do this to........so does this set the CEL off?
All you need is rr racing’s tune or 02 conditioner to eliminate CEL.
https://www.rr-racing.com/RR-Racing-...o2ss000001.htm


https://www.rr-racing.com/RR-Racing-...isftune002.htm
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Old 04-25-19, 04:55 AM
  #41  
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My conditioner would act up and set a CEL every 1000 miles or so. I have a tune now and no issues so far.
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Old 04-25-19, 09:55 PM
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Originally Posted by illtres50
All you need is rr racing’s tune or 02 conditioner to eliminate CEL.
https://www.rr-racing.com/RR-Racing-...o2ss000001.htm


https://www.rr-racing.com/RR-Racing-...isftune002.htm
Im actually selling my Conditioners Pm me
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Old 04-04-20, 11:03 PM
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Originally Posted by SebaSTiSF
Hey guys resurrecting this thread, so just did a thing.. got my exhaust guy to work miracles and he manged to get a straight pipe welded in the gutted header cats to get rid of that hollow chamber. Wanted to share the results with you guys.
I always thought about going this route too if I didn't get headers. How much did it cost you to get your cats hollowed out and have a pipe welded in? You got a tune or dyno along with this?
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