you know I think the srt6 might have a stroker crank, now that I think about it. How else would startech easily create the 3.8L upgrade for the NA m112 motor, mecedes bored and stroked the m113 engine to offer 4.3, 5.0 and 5.5 v8's while the m112 is 3.2L stock, they also have a 3.5L version of the m112 in the ML320 and a 3.7L and with piston sleeve kit that brings it up to 3.8L