2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Header/Downpipe

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Old 07-18-2010 | 12:55 PM
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From: Northern Virginia
Header/Downpipe

Im a 2.4L auto and have been looking for a header/downpipe for a while...

ZZP doesnt have the 1.5" primaries header in stock and wont for a while so I had a few questions:

1. Does anyone else make a 1.5" primaries header for our cars?

2. Could I get a 1.75" primaries header and its performance be just as good?

thanks for any info
-Justin
Old 07-18-2010 | 12:58 PM
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Ive run the 1.75 and been very happy with it.
Old 07-18-2010 | 01:11 PM
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Originally Posted by CordiaDOHC
Ive run the 1.75 and been very happy with it.
could you feel a difference on your stock dp?
Old 07-18-2010 | 01:17 PM
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Originally Posted by SJL26
could you feel a difference on your stock dp?
Im running the stock downpipe right now with a zzp 1.75 shorty header and yeah I can feel a difference and a difference in sound. Its not as big of a difference as it was with the header and the aftermarket downpipe though.
Old 07-18-2010 | 04:52 PM
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Clear Image Automotive.
There is SS and mild steel 1.75" in stock.
We have a ball and socket designe between the header and dp that eliminates a gasket that others have to use which can leak or blow out.
It also allows for some adjustment if needed when bolting everything up which no other companies can do.
If the 2 or 3 bolt flange at the end of the header is off, then everything else will be off.
Old 07-18-2010 | 06:05 PM
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but with downpipes doesnt the auto need a different one cause of the position of the engine
Old 07-18-2010 | 07:00 PM
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Originally Posted by kissrocker52
but with downpipes doesnt the auto need a different one cause of the position of the engine
Yes. I had problems with a manual zzp downpipe. It rubbed on the swaybar. This wasnt zzp's fault as they sell an auto downpipe and I had bought a used zzp midlength with a manual downpipe.
Old 07-18-2010 | 07:10 PM
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where is a good place to get a proper one to fit and auto
Old 07-19-2010 | 06:52 PM
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Originally Posted by kissrocker52
but with downpipes doesnt the auto need a different one cause of the position of the engine
I have a auto 2.4 with clearimage header/downpipe and there were no fitment issues.
Old 07-19-2010 | 07:27 PM
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Originally Posted by olivecj
I have a auto 2.4 with clearimage header/downpipe and there were no fitment issues.
how much did you pay? And dont you think the 1.75 primaries are a bit too big for N/A?
Old 07-20-2010 | 08:05 PM
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Originally Posted by SJL26
how much did you pay? And dont you think the 1.75 primaries are a bit too big for N/A?
Yes they would be I think, plus I asked Dan(the owner) at clearimage what was the best size header to get for my 2.4 and he said get the 1.5 primary so thats what I went with. It definetly added more high end power and low end power. The 1.75 primary might be too much and loose your low end a bit.
Old 07-20-2010 | 08:53 PM
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Originally Posted by olivecj
Yes they would be I think, plus I asked Dan(the owner) at clearimage what was the best size header to get for my 2.4 and he said get the 1.5 primary so thats what I went with. It definetly added more high end power and low end power. The 1.75 primary might be too much and loose your low end a bit.
Well without a tune running the 1.75 shorty with the stock downpipe im spinning 235's from a stand still for about 4-5 feet with an auto 2.4.... So id say my lowend is still there.
Old 07-20-2010 | 09:09 PM
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Oh yeah i'm sure it is, I just got what was suggested for me. I'm sure 1.75 is fine also.
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