IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

installed header and Y pipe yesterday

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Old 05-07-04, 03:00 PM
  #16  
_DAG_
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Default header?

In yall's opinions does the header really improve the performance? I have a Pro1 header, just curious that's all. Thanks.
Old 05-07-04, 08:04 PM
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DasGalloway
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Default Re: header?

Originally posted by _DAG_
In yall's opinions does the header really improve the performance? I have a Pro1 header, just curious that's all. Thanks.
Yes, they do. I don't know about the pro-1, but I do have dyno charts showing the gains you get from the toyomoto Gen1's.

One day I'll have time to do a writeup on that too
Old 05-07-04, 11:31 PM
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_DAG_
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Default header

Hey Das, that'd be really helpful to see numbers before and after. Pro1 is basically the same design as the Toyomoto I believe, however a sweet looking header is the JIC one, but it's also like 1 G! I believe the header adds a lil more to the peak hp, but in doing this, you lose some low end power. Thanks.
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