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Though 2009 Drag Paks were ostensibly offered with your choice of a 275hp 360 small-block (PN P5MOPP197), 305hp 5.7 Hemi (PN P5MOPP190) or 390hp 6.1 Hemi (PN P5MOPP189), the 2010 Drag Pak supplement sheet lists all of these engines plus a new 375hp 6.4 liter Hemi (PN P5MOPP794). However, a quick chat with Dave Hakim (one of the Drag Pak “chefs” during his tenure at Mopar Performance), confirms that the vast majority of 2009 and 2010 Drag Paks are equipped with the 6.1-liter Hemi shown here. Despite the 12.6:1 compression ratio and hot .584/.552 lift hydraulic roller cam, the NHRA rates the 6.1 Hemi at 390 hp (385 with manual transmission). Real world output is a tad higher.