The best 1/4 mile time I've ever seen in a mag is 15.7, and mag times are for unbroken cars. Hondas are typically quite a bit faster when broken in, so realistic times vary between 15.7 and 16.2. I don't go to 1/4 mile tracks, so I can't relate personal experience.

V12 is right though, no cat or muffler would end up losing low end torque.