Hey guys, I know there will be some eye rolling on the 4.0 performance, and lots of opinions. I have spent the last 2 hours reading post that laugh, mock and say there are no modification you can do to the 4.0 6cyl. to improve horse power or torque.
Of course I've read a few positive reviews of a couple things that may give 5 to 10 HP gains along with torque gains too.
Has anyone here done testing on the cold air intake, headers and cat back exhaust mods and found a combined increase in HP and torque.??
I think that if you do several things that "improve a total combined HP/Torque" to the jeep then it may be worth the trouble.
Of course I've read a few positive reviews of a couple things that may give 5 to 10 HP gains along with torque gains too.
Has anyone here done testing on the cold air intake, headers and cat back exhaust mods and found a combined increase in HP and torque.??
I think that if you do several things that "improve a total combined HP/Torque" to the jeep then it may be worth the trouble.