Can I use 6.1 hemi heads on my 5.7? - Chrysler 300C Forum: 300C & SRT8 Forums
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Old 12-06-2009, 11:41 AM   #1 (permalink)
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Can I use 6.1 hemi heads on my 5.7?

Not sure if this is possible but I have gotten a whiff of people considering changing out their 5.7 heads with the SRT8 6.1 heads. If this is possible would the conversion be difficult and would a 6.1 throttle body fit on the 5.7 as well? What would be a good cam shaft to use when upgrading the heads?
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Old 12-06-2009, 12:40 PM   #2 (permalink)
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The heads can be swapped out but you will need to lower compression. Throttle body is the same for both 6.1 and 5.7, the manifold is different though. This to can be swapped out but you need to change a few things. Do a search for 6.1L manifold swap, there are some writeups here. A guy on LXF did the same swap (but modified heads not stock heads) and used an SRT8 stock cam and he went from a 14.10 1/4 mile run to a 13.2 from memory.
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