Originally posted by PA 3L SVT:
Didn't the Taurus Duratec lose some power when the factory went to single exhaust at some point, then Ford went back to the 2 to 1 to 2 setup? Dunno about the pipe sizes and stuff, just something I think might be relevant here.
Yes, the HP rating dropped from 200 to 185. The single exhaust they used was more restrictive than the dual.
Also the Town Car, Grand Marques, and Crown Victoria increase 15 HP with dual exhaust from 220 to 235.
There are many other examples.
