Where did you get 8.6 from b/c SVT Lightning runs 8.5 in an 1/8 with a K&N in it and that is 390hp with 390tq. So ain't no way in hell he is running 8.6 on a 260hp with a K&N, sorry but he has got some other shit in his car or it is the svt or cobra model. An 8.6 is equivalent to a 12.9 1/4, since they run low 14's stock, a K&N will not give a mustang 100HP. A friend of mine gots the old 5.0 and he doesn't run a 12.9 with a K&N, so he must got something up his sleeves. Well, thanks everyone. I talked to my friend with the corolla gts 89 and he can beat mustang gt new or old, and he is running a 100-shot. I can beat him sometimes when he doesn't spray, so why wouldn't a turbo be good enough if nitrous runs out and turbo's don't, i think i am going to go with turbo b/c i know they can be beat by a dsm, except the new cobra and svt which have almost 400hp. I appreciate all the info, i am glad i got people to write in here and respond.

99 RS-T
"New bottom end(8.6:1 w/long rods)"
Turbonetics 60-1/Portfueler/etc!!!!!