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Header Install ?

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Old Feb 15, 2008 | 10:46 PM
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Default Header Install ?
Im getting ready to have ARH headers 1-7/8 w/hi flo cats and x pipe installed. i have a 2000 a4 it has a LS6 intake. blackwing, and tune.right now it dynos 335/335 , Any ideas what itll dyno after header install and tune?
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Old Feb 15, 2008 | 11:10 PM
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Should be good for 25-30hp after another tune.
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Old Feb 15, 2008 | 11:16 PM
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I hope you are right, It sure is alot of money for 10 to 15 hp
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Old Feb 16, 2008 | 02:32 AM
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You might be better off with 1 3/4" primaries instead.

Just my 2 cents though....
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Old Feb 16, 2008 | 07:45 AM
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Originally Posted by White-C5
I hope you are right, It sure is alot of money for 10 to 15 hp
your on the right path, you'll notice the sound is much cleaner; for another 60-70rwhp add the cam
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Old Feb 16, 2008 | 08:16 AM
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Originally Posted by tstar
You might be better off with 1 3/4" primaries instead.

Just my 2 cents though....


My thoughts as well. 1 7/8 primarys are going to be pretty big for a stock engine.
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Old Feb 16, 2008 | 08:29 AM
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imho, I don't think the 1/8" is going to have a big effect on power, It might take a few away at one pt and and add it at another, probably not more than 2-3rwhp
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Old Feb 16, 2008 | 09:07 AM
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I re-read the post and I'm afraid I owe the OP an appoligy!!!! It seems you already got the Headers and this discussion about primary size is pretty darn mute!

Sorry big guy!
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Old Feb 16, 2008 | 09:32 AM
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Actually guys i meant to say 1-3/4 and im getting them next week , sorry for the confusion on my end,
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Old Feb 16, 2008 | 09:39 AM
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Well see my sig, you should be a bit higher then me. I'll tell ya though, you got some DAMN nice numbers on your previous pull!!!
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Old Feb 16, 2008 | 10:58 AM
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Originally Posted by White-C5
Im getting ready to have ARH headers 1-7/8 w/hi flo cats and x pipe installed. i have a 2000 a4 it has a LS6 intake. blackwing, and tune.right now it dynos 335/335 , Any ideas what itll dyno after header install and tune?
ARH are a great header. . . I'm running a ARH system on my 1999 C5 with a modified LS6 engine under the hood. This is just my 2 cents here, but if you're gonna run your Vette on the street you'll probable be looking for mostly bottom and mid-range power. I would go with the 1 3/4 inch primarie pipes and not the 1 7/8". The 1 7/8" are good for top end turns. . . . . just a thought Bro. Make sure you get a good tune on your engine after your install to get max power out of the headers. Good luck !
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