I just wonder why the 6.4 doesn't lose any horsepower when using MDS, but the 5.7 does:scratchhead:.On Dodge.ca the price of the 6 speed is $2000 above the 2011 SRT8 392 base price. Also the MDS only comes on the auto. No mention that the 6.4 has VVT but I heard it does. Is stated on 5.7 .
Found it...VVT and variable intake on 6.4 .
According to the Dodge "Build My Own" Website, the "392 CID V8 SRT HEMI® Eng w/Fuel Saver Technology" has a Gas Guzzler Tax w/DGJ of $1,300, while the regular "392 CID V8 SRT HEMI® Engine" has a Gas Guzzler Tax of $1,000.What is the story on the MPG for the Auto w/MDS and the 6 speed? - I have't see that anywhere.... Do they both have the same gas guzzler tax?