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

Ppe vs sikky headers? Which one to go with?

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Old 11-16-18, 02:33 PM
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jat0223
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Nothing has perfect fitment. I had sikky headers for like 5 years and those rubbed on the chassis. I switched them to equal length PPEs and they also rub on the subframe in multiple places.
Old 11-16-18, 03:39 PM
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Jz39
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Originally Posted by jat0223
Nothing has perfect fitment. I had sikky headers for like 5 years and those rubbed on the chassis. I switched them to equal length PPEs and they also rub on the subframe in multiple places.

Any sound clips of your equal lengths??
Old 11-16-18, 03:46 PM
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flowrider
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Originally Posted by jat0223
Nothing has perfect fitment. I had sikky headers for like 5 years and those rubbed on the chassis. I switched them to equal length PPEs and they also rub on the subframe in multiple places.
Then something's wrong. I've had two sets of PPE headers, UL and EL. Neither rubbed anywhere

Lou
Old 11-16-18, 06:32 PM
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samjones
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American Racing Headers designed a set for the RCF which will fit the ISF as well...they are long tubes and the only option with 1-7/8" primaries .. The X pipe is included in their price .... One more option to consider guys
Old 11-16-18, 07:00 PM
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Jwconeil
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Ppe and JoeZ. No rubbing, leaking, or other odd issues. I bought the car with them, so I don’t know how the install went.
Old 11-17-18, 01:49 AM
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jat0223
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Originally Posted by flowrider
Then something's wrong. I've had two sets of PPE headers, UL and EL. Neither rubbed anywhere

Lou
It might have something to do with the rr racing motor mounts. I need to go back and get them checked out but I live 3 hours away from rr racing so haven't had time.
Old 11-17-18, 01:59 AM
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jat0223
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Originally Posted by Jz39



Any sound clips of your equal lengths??
This is the only video I have.

https://youtu.be/Gc265RehTHM
Old 11-17-18, 05:09 AM
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DekNgo
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Originally Posted by samjones
American Racing Headers designed a set for the RCF which will fit the ISF as well...they are long tubes and the only option with 1-7/8" primaries .. The X pipe is included in their price .... One more option to consider guys
Are you sure these will fit the ISF?
Old 11-17-18, 06:48 AM
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samjones
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Originally Posted by DekNgo
Are you sure these will fit the ISF?
Yes, I have them on my ISF. Pictures with and without the resonator





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Old 11-17-18, 06:56 AM
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Prezajf
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^^^ I love how those have the cats in them already. Thanks for sharing!
Old 11-17-18, 06:56 AM
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https://youtu.be/noueqjlObCA
this sound clip is without resonators (Headers, high flow cats, after market mufflers by cortek which is similar to borla)
No issues with the install other than the o2 sensors that needed to be replaced which is common. Also, I got the RR Racing engine mounts installed at the same time, and would highly recommend them.
Old 11-17-18, 06:59 AM
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Originally Posted by Prezajf
^^^ I love how those have the cats in them already. Thanks for sharing!
Well there's two sets of photos lol
Originally without high flow cats but with the resonator
Then with high flow cats but without the resonator
I had them add the high flow cats to reduce the smell and removed the resonator for more sound
Old 11-17-18, 11:08 AM
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ultimase
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Originally Posted by samjones
Well there's two sets of photos lol
Originally without high flow cats but with the resonator
Then with high flow cats but without the resonator
I had them add the high flow cats to reduce the smell and removed the resonator for more sound
Any dyno numbers, curious if there's much of a difference between these options.
Old 11-17-18, 12:32 PM
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No dyno numbers yet, hopefully next year once the car is out of storage. Definitely best noticable upgrade other than going with the supercharger
Old 11-17-18, 12:45 PM
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mahcah
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That system sounds slightly different but good. Looks to be mated to a Borla system?


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