dual exhaust?
 

i have a 90 bronco with the 351efi. i would like to change to a dual exhaust, but am not sure if i should split it after the cat or go with some shorty headers. also if i run the pipes out under the rear bumber will i have a problem with fumes in the truck? please help?:-huh

dual exhaust?
 

If you want gains in power and torque, run true duals with an "H" or"X" pipe. If you have inspections where you live, you might consider a pair of high flow cats. If not, cut 'em off. Headers aren't really necessary, but if you want even more hp and torque, run 'em. You might also consider a pair of Flowmasters-nice tone, good flow, and they come in all flavors from mild to wild(in volume).
:-X22

dual exhaust?
 

if i run the duals with the headers do i need to do anything to the motor because of the exhaust? i was told i might have to put in a computer chip or something?:-X11

dual exhaust?