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Old 07-22-2012, 05:30 AM   #1
Join Date: Feb 2012
Posts: 56
Headers on 2012 JK

Has anyone found/installed headers for the Pentastar motor? Was the difference in power noticeable?

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Old 07-22-2012, 05:37 AM   #2
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Join Date: May 2012
Posts: 510
I can't say for sure if it went into production like this (and it's too dark for me to go outside and look), but this article states the mainfolds are integrated as part of the cylinder heads:

2012 Jeep Wrangler JK 3.6 Pentastar V6 First Drive - Four Wheeler Magazine

The exhaust manifolds on the new engine are integrated into the heads. No more cracked or leaky cast-iron manifolds to worry about and no need to upgrade to headers. There is simply a single exhaust flange on each head that is directed right into the equal-length downpipes. In order to make them equal-length the driver side downpipe required a crazy-looking loop-de-loop near the lower control arm mount on the frame. It’s not really in a bad spot but it could be in the way of some aftermarket long-arm suspension lift kits. We wouldn’t recommend removing it because the engine is said to need it for improved exhaust scavenging, correct backpressure, and increased performance.
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