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hp gains with adding headers...

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Old Jan 25, 2008 | 04:13 PM
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Default hp gains with adding headers...

i have a 98' a4 z28 and for the most part it is stock...... i am wanting to add lt headers and wanted to know how much hp to the wheels it could add....
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Old Jan 25, 2008 | 04:35 PM
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10-20 rwhp, depending on the brand (style) and how close the AFR is to 12.8-13.0 after the install.
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Old Jan 25, 2008 | 07:23 PM
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I went from 306HP to 344HP with QTP longtube headers + true duals with cats and mufflers, 349 after tune. Despite having an A4, you should make a good amount with a 98 as we have a rich tune to begin with along with the 28lb injectors.
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Old Jan 27, 2008 | 01:42 PM
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A good brand like kooks or something 25hp maybe more with a tune.
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Old Jan 27, 2008 | 02:42 PM
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Originally Posted by mike c.
A good brand like kooks or something 25hp maybe more with a tune.
when i added my kooks i only picked up 9rwhp not counting the tune...
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Old Jan 27, 2008 | 05:30 PM
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25-30rwhp with a tune.
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Old Jan 27, 2008 | 07:32 PM
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i got about 25 hp with the tune.98 Z/28 A4.hooker LTs with ORY
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