hey fellas,

quick question, i have a 2003 fx4 with a 5.4, now if i want the most pony power, i go with the siso magnaflow right? b/c duals would have to much back pressure right?

now the kicker!! if im gonna put a air force intake and a superchip would that make a siso struggle?

or is that not enough mod to make a difference.

i want max horsepower, i was hoping i would buy an exhaust that would struggle after a few mods, any help would greatly be appreciated, look at it as a $400 question

thanx again guys

 

i dont think that dual tailpipes would effect it hardly any, plus they look better. Im running dual tailpipes with no muffler and i never noticed any power loss when i had my muffler cut out. If anything, a very slight gain in torque.

Just my .02

 

Do carsound cats, x-pipe, and 2 si/so magnaflow mufflers. Hard to beat

-Flea