Re: Srt6 top speed
The work AMG performs on these engines is more than just throwing on a s/c. They also use heavier duty racing components. The exhaust is larger; it has a stiffer suspension. Hence the R in SRT and the $10k original premium. One of the members is selling his modded SRT6 for under $18k on this forum -- great deal and not much more than a n/a coupe. As noted, a $15k n/a + $5k in upgrades still does not get you a stock SRT6 which cost $18-20k these days.