Im gonna go out on a limb and say chrysler (sp). But their new lineup of SRT(X) cars sure do pretty good. Low 14's on the 300C and the magnum I think, Then they have the SRT-4 which is nice I hate them myself but a great budget racer.
Then theres the dodge daytona charger coming out and what not, I really think that chrysler have really outdone themselves in correlation to the older muscle cars. Granted they put out 4dr sedans, but think about this, their a WHOLE lot more comfortable then the old muscle cars, and their faster stock for stock.