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Hey family a buddy of mine purchased a 2007 sublime Daytona charger and was seriously wanting to do the Hellcat supercharger swap once we found out about the mmx adapter kit ... Our question is . Are the Hellcat oem heads compatible to swap onto the 5.7 after all the 6.2 is basically just a 5.7 stroke with a 6.4 bore any help or advice would be greatly appreciated if were just trying to get a great bang on a budget
 

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2012 SRT Charger, 2003 Ram hemi, 2005 Magnum
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after all the 6.2 is basically just a 5.7 stroke with a 6.4 bore any help or advice would be greatly appreciated if were just trying to get a great bang on a budget
Simplistically yes (disregarding the VVT and non-VVT engine family differences), however the hellcat heads are based directly off the 392 head architecture, which includes valve sizes....which are too big for any 5.7 bore. What he can do is get a set of 6.1 or eagle 5.7 heads and bolt those on. They have similar architecture and port size and will work, bearing mind that bolting either on will raise the CR too high for boost really even with thicker gaskets (requiring piston replacement or having the chambers opened up). Honestly though if you want to bolt a Hellcat blower on a 5.7 the short block needs to be beefed unless that kit has the pullies necessary to keep boost down about 7-8psi (which is not what that particular blower was designed for). Luckily, the kit has the option to adapt it to the pre-eagle heads if need be.
 
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